The Radical Firearms BTR (Battle Tested Reliable) upper receiver delivers proven performance in a compact 7.5-inch barrel configuration. This 5.56 NATO chambered upper transforms any compatible AR-15 lower into a maneuverable platform ideal for close-quarters applications and vehicle operations.
What Makes This Different
The BTR series features Radical Firearms' proprietary barrel manufacturing process that maintains consistent accuracy despite the shorter barrel length. Unlike standard carbine-length systems, this 7.5-inch configuration reduces overall weapon length by 9 inches while maintaining reliable cycling with proper ammunition selection. The barrel utilizes a 1:7 twist rate optimized for heavier grain projectiles that perform better from shorter barrels.Key Features
- 7.5-inch 4150 chrome moly vanadium steel barrel with carbine-length gas system
- M4 feed ramp extension for enhanced feeding reliability
- Standard A2 flash hider reduces muzzle flash and protects crown
- Mil-spec upper receiver with T-marks for consistent optic mounting
- Free-floating handguard with M-LOK attachment points
- Low-profile gas block allows for unobstructed sight radius
- Compatible with all mil-spec AR-15 lower receivers
Technical Specs
- Caliber: 5.56 NATO/.223 Remington
- Barrel Length: 7.5 inches
- Twist Rate: 1:7 inches
- Gas System: Carbine length
- Barrel Material: 4150 Chrome Moly Vanadium
- Chamber: 5.56 NATO with M4 feed ramps
- Thread Pitch: 1/2x28 TPI
- Overall Length: Approximately 14.5 inches
- Weight: 2.8 pounds (approximate)
- Made in USA
