Weihrauch HW100X BP Bullpup Adjustable
The Weihrauch HW100X BP Bullpup Adjustable combines the established HW100 platform with a compact bullpup configuration and updated PCP technology. Designed around controlled handling, repeatable operation, and adaptable ergonomics, the HW 100 X-BP represents the long-format bullpup version of Weihrauch’s updated HW 100 X series.
Rather than simply changing the stock layout, Weihrauch has revised several major components of the HW100 platform. Most notably, an aluminium air cylinder is used with a 250-bar maximum filling pressure, while a redesigned regulator has been incorporated to improve consistency. Weihrauch also states that the updated system provides at least a 50% increase in firing capacity compared with the preceding platform. Weihrauch Sport
Updated HW100X PCP Platform
At the heart of the Weihrauch HW100X BP Bullpup Adjustable is a pre-charged pneumatic system engineered around consistent air delivery.
Because compressed air rather than a conventional spring system powers the rifle, the shooting cycle is described by Weihrauch as vibration-free. Meanwhile, the redesigned regulator controls the air supplied for each cycle, contributing to repeatable operation across the usable air charge. Weihrauch Sport
A lightweight aluminium air cartridge has also been introduced. Consequently, the updated HW 100 X series has been made lighter than the preceding configuration while retaining a substantial working pressure of up to 250 bar.
Core Features
Key characteristics of the HW 100 X-BP include:
- PCP operating system with 250-bar aluminium air cylinder
- Redesigned regulator for improved consistency
- 14-shot rotary magazine
- Two-stage adjustable match trigger
- Manual safety
- Forward-positioned Biathlon-style cocking lever
- Right- or left-handed cocking-lever configurations
- Picatinny or 11 mm scope-mounting options
- Fore-end Picatinny accessory rail
- Soft-touch bullpup stock
- Height- and laterally adjustable buttplate
- Integrated pressure gauge
- Quick-fill charging arrangement
- Air stripper supplied as standard
These characteristics are specified by Weihrauch for the current HW 100 X-BP/BPK platform. Weihrauch Sport
Compact Bullpup Architecture
A defining feature of the Weihrauch HW100X BP Bullpup Adjustable is its bullpup architecture.
In this configuration, major action components are positioned farther rearward than on a traditional sporting rifle. As a result, considerable barrel length can be retained while overall dimensions remain comparatively compact.
For users evaluating different HW100 configurations for sporting or range applications, that arrangement changes the rifle’s balance and handling characteristics without abandoning the familiar HW100 mechanical platform.
Furthermore, the stock is suitable for both right- and left-handed users. Weihrauch also offers the forward cocking system in a left-handed configuration, making the platform more adaptable than a fixed right-hand-only layout. Weihrauch Sport
Adjustable Buttplate
Ergonomic adjustment is another notable part of the design.
The buttplate can be adjusted vertically and laterally, allowing the rear contact point to be configured for different body proportions, shooting positions, and optic heights.
This becomes particularly useful on a bullpup because eye position, shoulder placement, and scope alignment are closely related. Small adjustments can therefore make the setup more comfortable and repeatable during extended range sessions.
Two-Stage Adjustable Match Trigger
Trigger configuration remains an important element of the HW100 platform.
A two-stage adjustable match trigger is fitted to the HW 100 X-BP. The manufacturer’s documentation provides adjustment for trigger weight and the transition through the second stage, although adjustment requires removal of the relevant stock components. Weihrauch Sport
For normal ownership, adjustments should always remain within the manufacturer’s instructions and any applicable local regulations.
The manual safety is incorporated into the operating system as an additional control.
14-Shot Magazine System
The Weihrauch HW100X BP Bullpup Adjustable uses Weihrauch’s established rotary magazine arrangement.
Official specifications list a 14-pellet magazine capacity. Weihrauch Sport
The Biathlon-style repeating lever is positioned farther forward than on traditional rear-action bullpup designs. Consequently, the operating hand does not need to travel as far backward between cycles.
That arrangement contributes significantly to the distinctive handling characteristics of the X-BP platform.
Flexible Optics Mounting
Optic installation has also been given considerable flexibility.
Depending on configuration, the HW 100 X-BP can be specified with either a Picatinny scope rail or an 11 mm prism/dovetail mounting system. Weihrauch Sport
This allows compatibility with a broad range of appropriate sporting optics and mounting systems.
Additionally, a Picatinny mounting section is located on the fore-end. It provides a standardized interface for compatible sporting accessories where lawful and appropriate.

Soft-Touch Bullpup Stock
The synthetic bullpup stock receives a soft-touch finish intended to provide a secure contact surface.
Unlike the conventional sporter-stock versions of the HW100, the bullpup layout concentrates the action and magazine closer to the shooter’s shoulder. Therefore, the rifle has a very different physical feel despite sharing the core HW100 X operating system.
Its stock layout is also explicitly designed for use by both right- and left-handed shooters. Weihrauch Sport
Updated 250-Bar Air System
One of the most substantial developments in the HW100 X generation is its new air system.
Earlier HW100 models established the platform’s reputation, while the X series introduces a lighter aluminium air cylinder rated to 250 bar.
According to Weihrauch, the change has produced:
- Reduced overall product weight
- At least 50% greater firing capacity
- A redesigned regulator
- Improved regulator consistency
Those changes are central to the distinction between the HW100 X family and the preceding HW100 generation. Weihrauch Sport
An integrated manometer allows cylinder pressure to be checked, while the quick-fill system is designed to simplify routine charging in accordance with the manufacturer’s instructions.
Available Calibres
Official Weihrauch specifications currently list the HW 100 X-BP/BPK in:
- .177
- .20
- .22
Availability and permitted power levels vary by jurisdiction, so applicable licensing, ownership, storage, and use requirements should always be checked locally. Weihrauch Sport
Air Stripper as Standard
The HW 100 X-BP is supplied with an air stripper as standard.
Weihrauch’s 2026 catalogue also identifies other muzzle-device configurations depending on market and specification. Weihrauch Sport
Because laws covering airguns and associated equipment differ significantly between countries, any optional configuration should be selected and used only where legally permitted.
Weihrauch HW100X BP Bullpup Adjustable Summary
The Weihrauch HW100X BP Bullpup Adjustable represents a substantial evolution of the long-running HW100 PCP platform.
Its defining elements include the compact bullpup stock, adjustable buttplate, ambidextrous stock geometry, forward Biathlon-style cocking mechanism, 14-shot magazine, adjustable two-stage trigger, flexible optic mounting and updated 250-bar air system.
At the same time, significant internal changes distinguish the X generation. A lighter aluminium cylinder, redesigned regulator and increased stated firing capacity modernize the system while retaining the basic characteristics associated with the HW100 family.
For prospective owners researching the model, the most important distinctions are therefore its bullpup configuration, adjustable ergonomics, updated regulated PCP system and flexible left- or right-handed setup. Weihrauch Sport
Calibres, FAC Power, Recommended Scope and Accessories
The Weihrauch HW100X BP Bullpup Adjustable is offered in several calibre and power configurations, allowing the platform to suit different sporting, target-shooting and regulated-airgun markets. Weihrauch currently lists the HW 100 X-BP in .177, .20 and .22 calibre, while power levels vary according to calibre, market and local legislation.
.177 Calibre – Flat Trajectory and Target-Focused Performance
The .177 calibre version is well suited to precision-oriented target shooting because lighter pellets generally produce a comparatively flat trajectory. In the current Weihrauch technical data, the HW 100 X-BP FAC configuration is listed at approximately 30 joules, with a stated velocity of up to 320 m/s, depending on the pellet used and testing conditions.
A 16.3-joule version is also listed, providing another factory configuration for markets where power is regulated differently. Meanwhile, Weihrauch lists a 7.5-joule configuration for jurisdictions requiring substantially lower output.
Because .177 pellets are comparatively small and light, this calibre remains especially attractive for paper targets, reactive targets and general range practice.
.20 Calibre – A Balanced Middle Option
For shooters who prefer something between .177 and .22, the .20 calibre HW100X BP offers an interesting compromise.
According to Weihrauch’s current technical specification, the long X-BP FAC version can produce approximately 33 joules with a stated velocity around 270 m/s. A 16.3-joule configuration is also available and is listed at approximately 185 m/s.
The .20 calibre combines some of the flatter-flight characteristics associated with smaller pellets with additional pellet mass compared with .177. Consequently, it can appeal to experienced users who want a less common but versatile calibre for sporting use.
Availability of .20 ammunition can vary considerably by region, however, so local availability should be considered before selecting this configuration.
.22 Calibre – Higher FAC Energy
Among the three listed chamberings, .22 calibre receives the highest published FAC energy figure for the HW 100 X-BP.
Weihrauch lists the FAC version at approximately 50 joules, with a stated velocity of up to 300 m/s. The manufacturer also lists 16.3-joule and 7.5-joule versions for different regulated markets.
Because .22 pellets are heavier than typical .177 alternatives, the calibre behaves differently in terms of trajectory and retained energy. Users should therefore select pellets and optics settings that suit the specific factory power configuration rather than assuming that settings from another calibre will transfer directly.
Understanding FAC Power
FAC commonly refers to higher-powered configurations that exceed particular jurisdictional thresholds and may therefore require licensing or additional legal authorization.
The term does not represent one universal power figure. Instead, an FAC-rated HW100X BP can have a different energy output depending on calibre and market specification.
For the current long HW 100 X-BP, Weihrauch lists approximately:
- .177 FAC: up to 30 J
- .20 FAC: up to 33 J
- .22 FAC: up to 50 J
- 16.3 J versions: available across the listed calibres
- 7.5 J versions: listed for selected calibre configurations
These are manufacturer’s nominal specifications, and actual figures can vary with ammunition, environmental conditions and individual rifle setup.
Owners should always confirm the exact legal classification applicable in their jurisdiction before using or transporting a higher-power version.
Recommended Scope Type for the HW100X BP
The HW100X BP is designed to accept an optic through either a Picatinny rail or an 11 mm prism rail, depending on the configuration ordered. This gives users considerable flexibility when matching an optic to the rifle.
For general target and sporting use, a variable-magnification air-rifle scope in roughly the 3-12x or 4-16x class provides a practical starting point. Lower magnification allows a wider field of view, whereas higher magnification can make small targets easier to observe during precision range work.
A scope with adjustable parallax is particularly useful on a PCP air rifle because shooting distances may vary considerably. Side-focus or adjustable-objective systems allow the image and reticle to be brought into a more consistent focal relationship at different distances.
Other useful optic features include:
- Clear multi-coated lenses
- Fine or moderately fine reticle
- Adjustable parallax
- Positive elevation and windage turrets
- Appropriate eye relief
- Durable construction
- Mounts matched precisely to the rifle’s rail type
The bullpup stock also places the shooter’s head relatively close to the action. Therefore, correct ring height and eye relief become particularly important when setting up the optic.

Scope Mounting Considerations
Before purchasing or fitting mounts, the exact rail configuration should be checked.
Some HW 100 X variants are supplied with a Picatinny interface, while others use an 11 mm prism rail.
Consequently, Picatinny rings should be used only with the corresponding rail, while appropriately sized dovetail rings should be selected for an 11 mm setup.
Medium-height rings often suit conventional objective sizes, although the correct height ultimately depends on the scope’s objective diameter, tube diameter and desired head position.
Useful Accessories for the HW100X BP
A number of practical accessories can complement the HW100X BP without altering its basic operating system.
Spare 14-Shot Magazines
The rifle uses a 14-shot rotary magazine, so spare magazines can make organised range sessions more convenient.
Keeping separate magazines for different approved pellet types can also make ammunition organisation easier.
PCP Filling Equipment
Because the HW100X uses a 250-bar PCP air system, suitable high-pressure filling equipment is required.
The rifle incorporates a quick-fill arrangement and integrated pressure gauge. Weihrauch states that its redesigned aluminium cylinder operates at up to 250 bar and contributes to increased shot capacity compared with the preceding HW100 platform.
Compatible filling equipment should always be rated appropriately for the pressures involved and used strictly according to the manufacturer’s instructions.
Protective Rifle Case
A padded hard or soft case helps protect the rifle and mounted optic during lawful storage and transportation.
Because the HW100X BP may be used with relatively substantial scopes, a case should provide sufficient internal clearance for the chosen optic and mounts.
Bipod or Front Support
The rifle includes a Picatinny mounting point on the fore-end, providing a standardized attachment location for compatible range-support accessories where lawful.
A suitable front support can improve stability during bench-based target shooting while keeping the rifle consistently positioned.
Pellet Storage and Maintenance Equipment
Good-quality pellet storage containers, a suitable cleaning kit, lens cloth and protective optic covers can also be useful additions.
Because PCP rifles depend on high-pressure seals and regulated airflow, maintenance should follow Weihrauch’s instructions rather than aggressive cleaning or unnecessary disassembly.
Matching the Setup to the Rifle
The Weihrauch HW100X BP Bullpup Adjustable provides considerable flexibility through its three listed calibres, multiple regulated power levels, adjustable buttplate and interchangeable optic-mounting arrangements.
For precision-focused shooting, .177 offers a particularly attractive trajectory profile. Meanwhile, .20 provides a middle-ground option, while .22 offers the highest published FAC energy of the three current X-BP calibres.
Whichever configuration is selected, the best results come from matching the calibre, legal power level, optic and accessories to the intended sporting application while remaining within the manufacturer’s operating instructions and all applicable local laws.
AirMaks, Umarex, PCP Air Rifles and Modern Airgun Options
The modern airgun market offers an increasingly broad selection of platforms for recreational shooting, target practice, sporting applications, and lawful pest-management duties. Buyers researching premium European PCP rifles frequently encounter names such as airmaks krait, airmaks, airmak, air marks, and air max krait. These search terms are commonly associated with compact, regulated PCP designs that emphasize accuracy, adjustability, handling, and efficient use of compressed air.
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AirMaks KRAiT and Katran PCP Platforms
Among shooters comparing contemporary Czech PCP designs, the airmaks krait family attracts attention because of its compact configuration and adaptable shooting platform. Searches such as airmaks krait .22 official often come from buyers specifically researching the .22-calibre configuration, manufacturer specifications, or authorized product information.
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The popularity of these platforms also highlights the reputation of czech gun manufacturers, particularly within the European precision-airgun sector. Czech engineering has become increasingly visible among enthusiasts looking for well-machined components, regulated actions, ergonomic stocks, and modern PCP configurations.
What Does PCP Air Rifle Mean?
For newcomers asking what does pcp air rifle mean, PCP stands for pre-charged pneumatic. A PCP air rifle stores compressed air in an onboard reservoir. When the trigger is operated, a measured quantity of stored air is released to propel the pellet.
Unlike spring-powered designs, PCP rifles do not require a large spring or gas ram to be compressed before every shot. Consequently, recoil can be relatively low, while repeatability and shooting comfort can be improved. The exact performance depends heavily on the rifle, calibre, regulator, projectile, pressure settings, and applicable legal restrictions.
Manufacturers and air gun makers now offer PCP equipment ranging from compact recreational platforms to sophisticated sporting rifles. Buyers may also come across air arm in searches while comparing manufacturers and product categories.
Air Rifles for Pest and Vermin Management
One important area of airgun research involves pest control with air rifles. Where local law permits it, an appropriately powered and accurately configured air rifle may be used for certain pest-management applications. However, humane dispatch, a safe backstop, correct projectile selection, suitable energy, landowner authorization, and compliance with local hunting or pest-control regulations remain essential.
People searching for an air rifle for pest control often prioritize accuracy and consistency rather than power alone. Similarly, searches for air rifle pest control typically focus on equipment that can deliver predictable shot placement at appropriate distances.
Choosing the best air rifle for pest control therefore depends on the intended quarry, legal power limits, shooting distance, calibre, environment, and shooter competence. The same principle applies when comparing vermin control guns. There is no universally ideal configuration because legal and practical requirements vary significantly between jurisdictions.
A pellet gun for pest control should be selected only when its power and accuracy are suitable for the lawful intended application. Buyers searching for the best pellet gun for pest control should place particular emphasis on reliable precision, appropriate ammunition, and responsible shot selection rather than simply choosing the highest available muzzle energy.
Umarex Airguns and Popular Platforms
Beyond AirMaks, umarex airguns represent one of the most extensively searched categories in recreational and sporting airguns. American buyers frequently search umarex usa or umarexusa when looking for product information, support, specifications, and locally available models.
The broader range of umarex air rifles includes PCP, CO2, spring-powered, and other air-powered platforms. One popular compact PCP search is umarex notos, while umarex notos carbine and the shorter search term notos are regularly used by people comparing compact PCP configurations.
Larger PCP platforms generate searches such as umarex gauntlet, umarex gauntlet 2, and umarex gauntlet 30. Other PCP-related searches include umarex origin, umarex zelos, and the cartridge-based umarex komplete. More specifically, buyers researching its .22 configuration may search umarex komplete ncr .22.
At the higher-energy end of the airgun market, search terms include umarex hammer, umarex hammer .50 caliber, umarex hammer carbine, and the general category 50 cal air rifle. Another specialized search is umarex primal 20, which relates to large-calibre airgun equipment intended for markets where such equipment is legally permitted.
Umarex Pistols, BB Guns, and Replica Platforms
Umarex is equally well known for replica pistols and CO2-powered recreational equipment. General phrases such as umarex bb gun, bb gun, bbgun, bb gun pistol, metal bb gun, pellet pistol, and co2 pellet pistols are frequently used by buyers comparing different recreational shooting formats.
Glock-licensed models produce particularly strong search interest. Examples include umarex glock, umarex glock 17, umarex glock 17 gen 5, umarex glock 19, and the highly specific umarex glock 19 gen3 .177 caliber bb gun air pistol. Related searches include glock 19 bb gun and glock 19x bb gun, while umarex glock 19x is often searched by enthusiasts wanting a replica inspired by the crossover Glock configuration.
Airsoft users employ similar terminology, including airsoft glock, airsoft glock 19, glock 17 airsoft, airsoft glock 17, glock airsoft gun, glock airsoft gas, and the unusual combined search phrase airsoft pistol.umarex dx17. Although BB and airsoft platforms can look similar externally, their ammunition, operating systems, intended uses, and performance characteristics can differ substantially.
T4E and Training-Oriented Airgun Searches
The umarex t4e family represents another significant product category. Searches such as umarex tr50, umarex hdr 50, and umarex t4e smith are frequently associated with training-oriented or recreational marker platforms, depending on local classification and regulations.
Technical searches can become very specific. For example, umarex p2p dr50 how many joules reflects buyers attempting to determine the muzzle-energy rating of a particular platform. Energy specifications should always be confirmed for the exact regional version because manufacturers may offer different configurations for different legal markets.

Another search phrase, umarex smith, may be used by customers researching Smith & Wesson-licensed replicas distributed through Umarex.
Break-Barrel and Sporting Airguns
Traditional break-barrel designs remain popular because they do not require a separate high-pressure filling system. The umarex trevox is one example frequently researched by pistol enthusiasts. Searches for loading umarex trevox break barrel .177 generally come from owners wanting to understand the basic loading process and calibre configuration.
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The umarex fusion 2 is another airgun searched by recreational shooters, while umarex synergis elite attracts attention among buyers researching repeating pellet-rifle systems.
Specialty Umarex Models and Replica Equipment
Umarex’s catalog extends well beyond conventional pellet rifles. Historical-style replica searches include umarex mp40 and umarex legends, while modern firearm-inspired replicas generate searches such as umarex mp5 and umarex hk heckler.
Other categories include the umarex shotgun, although the exact meaning can differ according to the model and regional catalog. Likewise, searches for umarex h may be incomplete or exploratory searches entered by customers looking for a particular H-series or Hammer-related product.
Specialized arrow-launching platforms are commonly searched under both umarex airsaber and umarex air saber. These are distinct from ordinary pellet rifles and should always be evaluated according to their intended sporting application and applicable regulations.
Understanding Buyer Search Terms
Not every search phrase represents an established product. Terms such as hamster with gun may represent novelty searches, memes, images, or unrelated content rather than a recognized airgun model. Consequently, shoppers should verify product names before assuming every search result refers to genuine equipment.
Likewise, variations in spelling are common throughout the airgun industry. Whether someone searches for AirMaks products, Umarex equipment, PCP systems, replicas, or traditional pellet guns, reliable manufacturer information remains more valuable than relying solely on loosely matched search terms.
Ultimately, choosing the right airgun should involve examining intended use, calibre, ergonomics, accuracy, legal classification, available power level, ammunition compatibility, servicing, and manufacturer support. Whether the search begins with a premium Czech PCP rifle or a recreational Umarex platform, an informed comparison provides a much stronger foundation for selecting equipment that fits the shooter’s lawful needs.


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