AR15 .300 Blackout Micro Pistol Upper Assembly 5" Barrel Custom 5.5" MLOK Handguard Complete w/ BCG & Charging Handle - Olive Drab Green

Description

Built around a 6061-T6 billet upper receiver with precise milspec tolerances, this upper features a 5.5” M-LOK handguard with an integrated handstop for added grip and maneuverability. The 5” 4150 CMV barrel with a 1:7 twist, chambered in .300 AAC Blackout, offers versatile performance across a range of loads. Outfitted with a 5/8x24 aluminum flash can, .750 gas block, micro gas system, and a steel barrel nut, this upper is compact and mission-ready. It’s finished with an MPI-tested nitride BCG, forged milspec charging handle, forward assist, and steel ejection port cover—a tight, reliable package built for close-quarters performance.

Upper Specifications

• 6061-T6 Aluminum Billet Upper Receiver w/ Milspec Tolerances
• 6061-T6 Aluminum ABC Rifle Co 5.5” MLOK Handguard w/ Integrated Handstop
• Steel Barrel Nut
• 4150 Chrome Moly Vanadium 5” 1:7 Twist .300 AAC Blackout Barrel
• .750 Low Profile Steel Gas Block
• Stainless Steel 5 3/16” Micro Gas Tube
• 5/8x24 7075 Aluminum Flash Can Muzzle Blast Diverter
• 8620 MPI Tested Full-Auto Rated Nitride Milspec Bolt Carrier Group w/ 9310 Bolt
• Milspec Stamped Steel Ejection Port Cover
• Milspec Forward Assist
• Forged 6061-T6 Aluminum Milspec Charging Handle

General Specifications

• Weight:
• Overall Length:
• Caliber: .300 Blackout