Details
Blem Reachback 8.5-Inch .300 BLK AR-15 Pistol Full Build Kit with SBA5 Brace
This full build kit combines an 8.5-inch Bear Creek Arsenal 4150 Chrome Moly Vanadium barrel with a blemished 7-inch freefloat M-Lok handguard, chambered in .300 Blackout. The kit includes an anodized 7075-T6 aluminum upper receiver with M4 feed ramps, micro low-profile gas block, pistol-length gas system, GI birdcage flash hider, mil-spec charging handle, 5.56x45mm QPQ nitride bolt carrier group, SB Tactical SBA5 pistol stabilizing brace, mil-spec heavy-duty 6-position buffer tube, 3 oz buffer, carbine recoil spring, castle nut, end plate, and lower parts kit. This is a blemished handguard with cosmetic imperfections that do not affect function. Lower receiver not included.
Key Features
- Blem handguard, cosmetic imperfections do not affect function
- 8.5-inch Bear Creek Arsenal heavy barrel, 4150 Chrome Moly Vanadium with parkerized finish, 1:8 twist rate
- Blem 7-inch freefloat M-Lok handguard, cosmetic finish irregularities, full functionality preserved
- Anodized AR-15 upper receiver with M4 feed ramps, 7075-T6 aluminum
- Pistol-length gas system with .750 micro low-profile gas block
- AR-15 5.56x45mm QPQ nitride bolt carrier group, 9310 alloy steel
- SB Tactical SBA5 pistol stabilizing brace
- Mil-spec heavy-duty 6-position buffer tube with 3 oz buffer, carbine recoil spring, castle nut, and end plate
- 5/8x24 threaded barrel with GI birdcage flash hider
Perfect For
- Budget-conscious .300 Blackout pistol builds requiring only a lower receiver
- Shooters prioritizing value over cosmetic perfection
- Builders seeking Bear Creek Arsenal heavy profile barrels with SB Tactical SBA5 braces
- Configurations demanding freefloat M-Lok handguards with all required lower parts
Blem Handguard Value
This kit features a blemished 7-inch freefloat M-Lok handguard with minor cosmetic imperfections such as finish irregularities or surface marks. These blemishes do not affect structural integrity, M-Lok slot functionality, or barrel freefloat performance. The blem designation provides significant value for builders focused on function.
.300 Blackout Chambering
.300 Blackout provides versatility across subsonic and supersonic ammunition in a compact platform. The caliber delivers effective terminal performance at close to intermediate ranges while maintaining compatibility with standard AR-15 lower receivers and magazines.
SB Tactical SBA5 Brace
The SB Tactical SBA5 pistol stabilizing brace features adjustable positioning with multiple length options. The brace pairs with the included mil-spec heavy-duty 6-position buffer tube, 3 oz buffer, carbine recoil spring, castle nut, and end plate.
QPQ Nitride Bolt Carrier Group
The 5.56x45mm bolt carrier group features QPQ nitride finish over 9310 alloy steel. The nitride treatment provides corrosion resistance and surface hardness while reducing friction. This BCG is compatible with .300 Blackout chambering.
Compatibility and Assembly
This full build kit is compatible with mil-spec AR-15 lower receivers. All components use standard AR-15 specifications and threading, including the 5/8x24 TPI muzzle threads matching the included GI birdcage flash hider.
Lower receiver not included. Follow safe handling and manufacturer instructions. Ensure compliance with all applicable federal, state, and local laws.
