Frequently Asked Questions about the AirForce Tex-Rex Brush Gun

What exactly is this rifle designed for?
This compact big-bore pre-charged pneumatic air rifle was created for hunters who regularly work in thick vegetation, dense woodland, blinds, and other tight environments. Its short overall length and relatively light weight make it far easier to carry and shoulder quickly than longer traditional big-bore platforms. At the same time it retains the substantial energy needed for ethical harvests of medium to large game at typical close-to-medium ranges. The design prioritises real-world handling in brushy terrain while delivering the terminal performance expected from a modern high-power airgun.

Which calibres are available?
The rifle is offered in two proven big-bore options: .457 and .510. The .510 chambering generally produces the highest energy figures when paired with heavy projectiles and is often chosen for larger animals. The .457 version provides excellent power with a useful balance of velocity, energy and shot efficiency, making it a versatile choice for a wide range of game. Both share the same compact chassis, air system and accessory interfaces, so the decision usually comes down to preferred projectile weight, local regulations and the specific animals being pursued.

How much power does it actually produce?
Energy output depends on calibre, projectile weight and the selected Bias Port setting. In .510 the rifle can exceed 700 foot-pounds with a heavy slug such as a 620-grain projectile when the most restrictive port is used. In .457, well-tuned loads commonly deliver over 500 foot-pounds, with many configurations reaching the mid-to-high 500s. Velocity figures also vary: heavier projectiles travel more slowly but carry greater energy, while lighter ones increase speed and can improve shot count. The adjustable Bias Port Orifice System allows users to prioritise maximum energy or a more efficient multi-shot setup according to their needs.

What is the Bias Port system and how does it work?
The Bias Port Orifice System is a simple yet effective way to tune airflow from the high-pressure reservoir into the valve. Different port screws (or no screw at all) change the volume of air delivered on each shot. A smaller orifice maximises energy for heavy projectiles and short-range impact. A larger orifice or open setting increases efficiency and the number of usable shots per fill. Changing ports is straightforward and lets the same rifle adapt to different hunting styles or game sizes without permanent modification.

Is this rifle FAC-rated?
Yes. In the United Kingdom any air rifle producing more than 12 foot-pounds of muzzle energy requires a Firearms Certificate. This platform generates energy measured in the hundreds of foot-pounds, placing it firmly in the FAC category. Prospective owners must hold a valid certificate that authorises possession of a high-powered air rifle in the relevant calibre. Secure storage, transport and use rules that apply to Section 1 firearms also apply. Regulations differ in other countries, so always verify local licensing, power limits and hunting laws before purchase or use.

What are the key dimensions and weight?
Overall length is approximately 31.5 inches, with a 16-inch Lothar Walther barrel. Unloaded weight is around 6.3 pounds thanks to the carbon-fibre air tank that also functions as the buttstock. These compact dimensions and modest weight contribute significantly to the rifle’s excellent manoeuvrability in thick cover and confined shooting positions.

How many shots can be expected from a full fill?
Shot count varies with port setting, projectile weight and how aggressively the rifle is tuned for power. On maximum-energy settings a few full-power shots are typical. When the system is configured for greater efficiency, several consistent shots become available. The 500cc carbon-fibre reservoir filled to 4,500 PSI provides a solid air reserve, but as with any high-power PCP the emphasis is on quality rather than quantity of shots.

What is the maximum fill pressure?
The recommended maximum fill pressure is 4,500 PSI (310 Bar). Always use a suitable high-pressure air source and follow safe filling procedures. Opening the cocking lever during initial fills and subsequent refills is advised to protect the system.

Can optics and accessories be mounted easily?
Yes. A full-length Picatinny rail runs along the top for secure mounting of day scopes, thermal imagers or night-vision devices. Upper and lower 11mm dovetail rails provide additional real estate for bipods, lights, lasers or other accessories. The modular layout allows most users to create a personalised setup without gunsmithing.

Is the muzzle threaded for a moderator?
The muzzle features M18x1 threading, making the rifle ready for compatible aftermarket moderators where their use is legal. Adding a moderator can improve shooting comfort and help manage report, provided local regulations permit it.

What type of action and trigger does it have?
It uses a single-shot side-lever action. The trigger is a two-stage design that supports precise shot placement. A manual safety is fitted for deliberate control in the field.

Who is this rifle best suited for?
It suits hunters who spend time in dense brush, river bottoms, thick woodland or blinds and who need both handling speed and decisive terminal energy. It is also appropriate for experienced airgunners seeking a compact big-bore platform and for those who already hold the necessary licensing for high-powered air rifles. Newcomers to big-bore PCPs should be prepared for the responsibilities that come with high energy levels and should prioritise safe handling and accurate range estimation.

What kind of range is realistic?
The platform is optimised for the distances typically encountered in brush hunting—often 50 yards and closer. With good shot placement and appropriate projectiles it remains capable of ethical performance at somewhat longer ranges when conditions allow. As with any high-energy air rifle, the limiting factors are accuracy, wind, projectile choice and the shooter’s ability to place the shot correctly.

Is it suitable for hunting large game such as hogs and deer?
When paired with suitable heavy projectiles and tuned for adequate energy, yes. Many users employ it successfully on hogs, deer and similar animals at appropriate distances. Ethical hunting always requires sufficient energy, accurate shot placement and knowledge of the animal’s anatomy. Local regulations regarding legal methods of take must also be observed.

Where is the rifle manufactured?
It is precision CNC-machined in Fort Worth, Texas, and is proudly made in the United States.

What warranty is offered?
A limited lifetime warranty is provided by the manufacturer, reflecting confidence in the platform’s durability when used and maintained as intended.

How does the compact design compare with longer big-bore air rifles?
Longer barrels can offer slight velocity advantages in some configurations, but they reduce manoeuvrability in thick cover and confined spaces. This rifle deliberately trades a small amount of potential velocity for a much shorter overall length and improved handling. For hunters who operate primarily in dense terrain, the handling benefit often outweighs the modest difference in maximum velocity.

What maintenance is required?
Routine care includes keeping the rifle clean, inspecting seals and the high-pressure system periodically, using clean dry air, and storing the rifle safely with residual pressure managed according to the manufacturer’s guidance. Avoid dry-firing and always follow the safety and operation instructions supplied with the rifle. Professional servicing is recommended if any issues arise with the valve or high-pressure components.

Can the power be reduced for different applications?
Yes. The Bias Port system allows users to dial energy down from maximum settings, increasing shot count and reducing the intensity of each discharge when full power is not required. This flexibility is one of the practical advantages of the design.

Is a carbon-fibre tank an advantage?
The 500cc carbon-fibre reservoir keeps overall weight low and contributes to the rifle’s excellent balance. Carbon-fibre tanks are widely used in modern high-pressure airguns because they offer a favourable strength-to-weight ratio when manufactured and maintained correctly.

What should first-time buyers consider before purchasing?
Confirm that you hold any required licences or certificates, understand the energy levels involved, select a calibre and projectile combination suited to your intended game, and plan for a quality optic and secure storage. Practise with the rifle to become familiar with its handling and point of impact before using it in the field. Always prioritise safety and compliance with local laws.

Does the rifle come with open sights?
It is optics-ready. Open sights are not fitted as standard; users typically mount a scope or other optical device on the Picatinny rail.

How does temperature or altitude affect performance?
High-pressure air systems can show some variation with temperature and altitude because air density and pressure behaviour change. Consistent filling practices and verification with a chronograph help maintain predictable results across different conditions.

Is the trigger adjustable?
It is a two-stage trigger. Specific adjustment ranges should be confirmed in the owner’s manual, but the design supports a crisp, controllable break suitable for precise hunting shots.

What makes the platform particularly suitable for blinds and thick cover?
The combination of short overall length, modest weight and quick shouldering characteristics allows the rifle to be brought into action rapidly in confined spaces where longer guns become cumbersome. The substantial energy ensures that once the shot is presented, the terminal performance is available.

These answers address the most common practical questions raised by potential owners and users. The rifle’s combination of compact dimensions, tunable high energy, modern rail system and American manufacturing continues to appeal to hunters who need capability in demanding environments. Always consult the official owner’s manual and current local regulations for the most accurate guidance on safe and legal use.