300 Blackout Upper Receivers

ABC RIFLE COMPANY AR-15 .300 AAC Blackout Micro Pistol Build 5in Barrel 4in M-LOK Handguard Upper Receiver Tungsten

ABC RIFLE COMPANY AR-15 .300 AAC Blackout Micro Pistol 5in Barrel M-LOK Handguard Upper Receiver w/BCG And Charging Handle Rose

ABC RIFLE COMPANY AR-15 .300 AAC Blackout Micro Pistol 5in Barrel M-LOK Handguard Upper Receiver w/BCG And Charging Handle Robbin's Egg Blue

ABC RIFLE COMPANY AR-15 .300 AAC Blackout Micro Pistol 5in Barrel Custom 5in Top Cut Custom M-LOK Handguard Complete Upper Receiver w/BCG And Charging

ABC RIFLE COMPANY AR-15 .300 AAC Blackout Micro Pistol 5in Barrel Custom 5in Top Cut Custom M-LOK Handguard Complete Upper Receiver w/BCG And Charging

ABC RIFLE COMPANY AR-15 .300 AAC Blackout Micro Pistol 5in Barrel Custom 5in Top Cut Custom M-LOK Handguard Complete Upper Receiver w/BCG And Charging

ABC RIFLE COMPANY AR-15 .300 AAC Blackout Micro Pistol 5in Barrel Custom 5in Top Cut Custom M-LOK Handguard Complete Upper Receiver w/BCG And Charging

ABC RIFLE COMPANY AR-15 .300 AAC Blackout Micro Pistol 5in Barrel Custom 5in Top Cut Custom M-LOK Handguard Complete Upper Receiver w/BCG And Charging

ABC RIFLE COMPANY AR-15 .300 AAC Blackout Complete Build 16in Barrel 15in Lightweight Hybrid M-LOK Handguard Upper Receiver 5/8x24 Nitride Sniper Grey

ABC RIFLE COMPANY AR-15 .300 AAC Blackout Complete Build 16in Barrel 15in Lightweight Hybrid M-LOK Handguard Upper Receiver 5/8x24 Nitride Black

ABC RIFLE COMPANY AR-15 .300 AAC Blackout Complete Build 16in Barrel 15in Lightweight Hybrid M-LOK Handguard Upper Receiver 5/8x24 Nitride Olive Drab

ABC RIFLE COMPANY AR-15 .300 AAC Blackout Complete Build 16in Barrel 15in Lightweight Hybrid M-LOK Handguard Upper Receiver 5/8x24 Nitride Burnt

ABC RIFLE COMPANY AR-15 .300 AAC Blackout Pistol 10in Quadrail Handguard Complete Upper Receiver w/BCG And Charging Handle Olive Drab Green

ABC RIFLE COMPANY AR-15 .300 AAC Blackout Pistol 10in Quadrail Handguard Complete Upper Receiver w/BCG And Charging Handle Flat Dark Earth

ABC RIFLE COMPANY AR-15 .300 AAC Blackout Pistol 10in Quadrail Handguard Complete Upper Receiver w/BCG And Charging Handle White

ABC RIFLE COMPANY AR-15 .300 AAC Blackout Micro Pistol 5in Barrel M-LOK Handguard Upper Receiver w/BCG And Charging Handle Red

ABC RIFLE COMPANY AR-15 .300 AAC Blackout Micro Pistol 5in Barrel M-LOK Handguard Upper Receiver w/BCG And Charging Handle Olive Drab Green

ABC RIFLE COMPANY AR-15 .300 AAC Blackout Micro Pistol 5in Barrel Custom 5in Top Cut Custom M-LOK Handguard Complete Upper Receiver w/BCG And Charging

CMMG DISSENT Mk4 300BLK 14.5in P&W Upper Receiver 1-7 Twist 5/8 X 24 TPI .750in 23.6in Coyote Tan

CMMG DISSENT Mk4 300BLK 16.1in Upper Receiver 1-7 Twist 25.5in 5/8x24 TPI .750in Tungsten

CMMG DISSENT Mk4 300BLK 16.1in Upper Receiver 1-7 Twist 25.5in 5/8x24 TPI .750in Armor Black

AIM Sports Inc Complete AR Pistol Kit Pistol Length Gas 300 Blk 10.5in Black Large Black Large

AIM Sports Inc Complete AR 10.5in .300 Blk 11in Pistol Length Gas Upper w/Nitride BCG Black Large Black Large

CMMG DISSENT Upper Receiver Mk4 300BLK 10.5in 1-7 Twist 5/8x24 Thread Zeroed Linear Compensator Midnight Bronze