The Tex-Rex® .510 Big-Bore PCP Brush Gun is the most compact and maneuverable PCP Airgun platform in the Tex-Rex lineup—built for hunters operating in tight cover where speed, control, and massive stopping power matter most.
Precision CNC-machined in Fort Worth, Texas, this ultra-compact .510 caliber big bore delivers over 675 foot-pounds of energy with a 620-grain slug from its rugged 16-inch Lothar Walther barrel. Designed for blinds, dense timber, mesquite, and aggressive field use, the Tex-Rex Brush Gun combines fast handling with uncompromising big bore power.
The shortened barrel dramatically improves maneuverability in confined hunting environments while retaining the devastating terminal performance Tex-Rex rifles are known for.
Built for the Modern Hunter
- 16-inch Lothar Walther barrel
- Full-length Picatinny optics rail
- Upper and lower 11mm accessory dovetail rails
- Manual safety
- M18x1 moderator-ready muzzle threads
- Precision CNC-machined in Texas, USA
WHY HUNT WITH THE TEX-REX .510 BIG-BORE BRUSH GUN?
Massive Big Bore Power
Delivers 675+ FPE with heavy 620 grain .510 caliber slugs.
Ultra-Compact Configuration
Built for blinds, brush, vehicles, and fast target transitions.
Optics & Thermal Ready
Full-length Picatinny scope rail supports modern optics and thermal systems.
Accessory Compatible
Upper and lower dovetail rails support bipods, lights, lasers, and accessories.
Manual Safety
Added confidence and control in demanding hunting conditions.
TUNEABLE BIAS PORT SYSTEM
The TEX-REX Brush Gun features AirForce’s adjustable Bias Port System, allowing shooters to fine-tune performance using interchangeable port screws.
- .040″ Port Screw — Maximum power for heavy slugs and large game
- .067″ Port Screw — Balanced power and improved efficiency
- Open Port (No Screw) — Increased airflow for additional shot count and field flexibility
BIAS PORT REFERENCE CHART – .510 Cal
| Port | Slug | Velocity | FPE |
| 0.040″ | 225 gr | 980+ fps | 480+ FPE |
| 0.040″ | 620 gr | 699+ fps | 675+ FPE |
| 0.067″ | 385 gr | 820+ fps | 575+ FPE |
| OPEN | 225 gr | 980+ fps | 480+ FPE |
Choose the Bias Port configuration that best fits your hunting style—maximize raw big bore power for trophy-class game or optimize efficiency and shot count for extended time in the field.
DESIGNED FOR HUNTERS WHO DEMAND MORE
- Built on the proven Texan platform trusted worldwide
- Modular frame accepts optics, bipods, and accessories
- M18x1 threaded muzzle for aftermarket moderators
- Compact enough for blinds and heavy brush
- Powerful enough for serious big game hunting
Ideal For: Deer • Hogs • Ram • Exotic Game • Predator Defense
Tex-Rex® .510 Big-Bore PCP Brush Gun
SKU: #U305064
