Details
Epoch SBR Ready 10.5-Inch Pistol-Gas 1-8 .300 BLK AR-15 Freefloat M-LOK Handguard Pistol Full Build Kit
This is an AR-15 pistol full build kit chambered in .300 AAC Blackout, centered on a 10.5-inch HBAR profile Parkerized barrel with a 1-8 twist rate and a pistol-length gas system. The Black Diamond Series slick side billet aluminum upper receiver made in the USA anchors the front end. The pistol-length gas tube and premium low-profile adjustable gas block at .750 complete the gas system, and the 7-inch freefloat aluminum M-LOK handguard in black covers the forend. A GI Birdcage flash hider at 5-8x24 closes out the muzzle end. A complete AR-15 bolt carrier group made in the USA compatible with 5.56, .223, .300 BLK, and .350 Legend, and a Mil-Spec M4 charging handle complete the upper side. The lower completion package covers a complete Mil-Spec AR-15 lower parts kit, a Mil-Spec heavy-duty 6-position buffer tube, a standard AR-15 carbine buffer at 3 oz., a standard AR-15 carbine recoil spring made in the USA, a Mil-Spec AR-15 M16 receiver end plate, and a Mil-Spec AR-15 carbine castle nut. This kit ships without a brace, leaving the final rear end setup to the buyer. Lower receiver not included.
Key Features
- .300 AAC Blackout chambering, 10.5-inch HBAR profile barrel, Parkerized finish
- 1-8 twist rate, 5-8x24 thread pitch
- Pistol-length gas system with pistol-length gas tube
- Premium low-profile adjustable gas block, .750
- Black Diamond Series slick side billet aluminum upper receiver, USA made
- 7-inch freefloat aluminum M-LOK handguard, black
- Complete AR-15 bolt carrier group, made in the USA, 5.56, .223, .300 BLK, .350 Legend compatible
- Mil-Spec AR-15 M4 charging handle
- GI Birdcage flash hider, 5-8x24 thread pitch
- Black steel crush washer
- Complete Mil-Spec AR-15 lower parts kit
- Mil-Spec heavy-duty 6-position buffer tube
- Standard AR-15 carbine buffer, 3 oz.
- Standard AR-15 carbine recoil spring, made in the USA
- Mil-Spec AR-15 M16 receiver end plate
- Mil-Spec AR-15 carbine castle nut
- SBR Ready
Perfect For
- AR-15 pistol builders who need everything above the lower receiver for a .300 BLK build
- Shooters pairing this kit with an existing stripped or complete AR-15 lower receiver
- Builders selecting their own brace or stock for a custom .300 BLK pistol or SBR platform with a USA-made slick side billet upper and adjustable gas block already covered
Upper Assembly
The Black Diamond Series slick side billet aluminum upper receiver made in the USA anchors the front end with a clean slick side exterior profile that omits the forward assist and dust cover from the receiver body, giving the upper a streamlined appearance distinct from standard mil-spec upper receivers. The 10.5-inch HBAR profile Parkerized barrel brings a 1-8 twist rate to the .300 AAC Blackout chamber, threaded at 5-8x24. The pistol-length gas tube and premium low-profile adjustable gas block at .750 run a pistol-length gas system along the 10.5-inch barrel, with the adjustable gas block giving the builder precise gas flow control at the block level. The 7-inch freefloat aluminum M-LOK handguard in black surrounds the barrel and gas block along the forend with M-LOK slots along the handguard body for accessory attachment.
Bolt Carrier Group and Charging Handle
The complete AR-15 bolt carrier group is made in the USA and compatible with 5.56, .223, .300 BLK, and .350 Legend, making it a well-suited choice for this .300 BLK chambering. The Mil-Spec M4 charging handle pairs with the BCG inside the upper receiver to complete the upper interior and finish the front end of the build.
Muzzle Device
The GI Birdcage flash hider threads onto the 5-8x24 muzzle end of the barrel. The included black steel crush washer seats at the barrel shoulder and completes the muzzle hardware for this kit.
Lower Completion Components
The complete Mil-Spec AR-15 lower parts kit covers the full internal lower component group, including the fire control group, magazine catch, bolt catch, and all associated pins and springs. The Mil-Spec heavy-duty 6-position buffer tube, standard AR-15 carbine buffer at 3 oz., and standard AR-15 carbine recoil spring made in the USA form the buffer system at the rear of the lower. The Mil-Spec AR-15 M16 receiver end plate and Mil-Spec AR-15 carbine castle nut lock the buffer tube down cleanly at the rear of the lower receiver. The brace or stock selection is left entirely to the buyer, keeping the final rear end open for a custom setup.
SBR Ready
This kit ships without a brace and is intended for builders selecting their own final rear end setup. The Mil-Spec heavy-duty 6-position buffer tube and complete lower hardware are included, but the brace or stock is sourced separately by the buyer. The final rear end configuration is setup dependent and determined by the component the buyer selects.
Follow safe handling and manufacturer instructions. Ensure compliance with all applicable federal, state, and local laws. Ships without a brace. Do not attach a stock unless compliant with applicable laws. Lower receiver not included.
