300 Blackout Upper Receivers

CMMG Upper Group Banshee Mk4 .300BLK 12.5in Armor Black

Sig Sauer MCX Rattler .300 BLK 5.5" M-LOK Upper Receiver UAMCX-5B-300-BLK-TAP

AR-STONER AR-15 Pistol Kit 5" Barrel 300 AAC Blackout

Maxim Defense MDX 510 AR-15 Complete Upper Receiver 300 AAC Blackout 10.3" Barrel Black

POF-USA AR-15 P415 Edge Complete Upper Receiver 300 AAC Blackout 10.5" Barrel 9" MRR M-LOK Hanguard Burnt Bronze

POF Renegade Plus Tactical AR Pistol Burnt Bronze

POF Renegade Plus AR Pistol

CMMG Resolute 100 Series .300 BLK Complete AR-15 Upper Receiver - 16.1"

CMMG Banshee 100 8" 300 Blackout 1:7 M-LOK Complete Upper

RADICAL FIREARMS MHR 300 AAC Blackout 10.5" 30rd - Black

Radical Firearms Forged

Dirty Bird AR-15 Forged Multi-Cal Receiver Set + SRMS Handguard - FDE, 9.5"

Stag 15 300 Blackout 8in Upper Receivers - Stag 15 .300 Blackout 8 In Upper

SOLGW M4-89 9" 300BLK URG

SOLGW M4-EXO3 10.5" 300BLK URG

Ar-15 Upper Receiver Assembly 300blk No Bcg

Maxim Defense MDX 508 AR-15 Complete Upper Receiver 300 AAC Blackout 8.5" Barrel Black

APF 300 Blackout Econo Pstl 7 Freefloat A3 Upper Rcvr

ANDERSON 300Blk Upper 16" No BCG or Charging Handle

Brn-180sh Suppressor Optimized 300 Blackout 10'''' Upper Receiver - Brn-180sh 10'''' Upper Receiver 300blk

LWRC International LWRCI ICMKII A5 .300 Blackout 10" Bbl Tungsten Grey SBR Upper ICMKIIU3TG10S

LWRC International LWRCI ICMKII A5 .300 Blackout 10" Bbl Patriot Brown SBR Upper ICMKIIU3PBC10S

LWRC International LWRCI ICDI .300 Blackout 16" Bbl Direct Impingement M-LOK Patriot Brown Upper ICDIU3PBC16ML

LWRC International LWRCI ICDI .300 Blackout 16" Bbl Direct Impingement M-LOK FDE Upper ICDIU3CK16ML