300 Blackout Upper Receivers

DRD Tactical U300 13" QD Rail System

HM Defense 16MSUP300 300 Blackout Aluminum

Alien Armory Tactical Anodized Aluminum Dust Cover - Red | Includes Rod Spring & Clip

Alien Armory Tactical Anodized Aluminum Dust Cover - Black | Includes Rod Spring & Clip

Mitchell Defense The DOC AR-15 .300 BLK 10.3in Upper Receiver Chrome-Moly Barrel Jungle Green Finish Quad Rail Handguard

Mitchell Defense The DOC AR-15 .300 BLK 10.3in Upper Receiver Chrome-Moly Barrel Jungle Green Finish M-LOK Free-Float Handguard

Mitchell Defense The DOC AR-15 .300 BLK 10.3in Upper Receiver Chrome-Moly Barrel Flat Dark Earth Finish Quad Rail Handguard

Mitchell Defense The DOC AR-15 .300 BLK 10.3in Upper Receiver Chrome-Moly Barrel Flat Dark Earth Finish M-LOK Free-Float Handguard

Mitchell Defense The DOC AR-15 .300 BLK 10.3in Upper Receiver Chrome-Moly Barrel Black Finish Quad Rail Handguard

Mitchell Defense The DOC AR-15 .300 BLK 10.3in Upper Receiver Chrome-Moly Barrel Black Finish M-LOK Free-Float Handguard

Mitchell Defense The DOC AR-15 .300 BLK 7.5in Upper Receiver Chrome-Moly Barrel Black Finish M-LOK Free-Float Handguard

LWRC International LWRCI ICMKII A5 .300 Blackout 10" Bbl OD Green SBR Upper ICMKIIU3ODG10S

LWRC International LWRC IC-A5 .300 Blackout 10.5" 1:7" 1/2x28 FDE Complete Upper Receiver ICMKIIU3CK10S in Flat Dark Earth

LWRC International LWRCI ICMKII A5 .300 Blackout 10" Bbl Black SBR Upper ICMKIIU3B10S

LWRC International LWRCI ICDI .300 Blackout 16" Bbl Direct Impingement M-LOK Tungsten Grey Upper ICDIU3TG16ML

LWRC International LWRCI ICDI .300 Blackout 16" Bbl Direct Impingement M-LOK OD Green Upper ICDIU3ODG16ML

Bilson Arms BA-15FC 300 Blackout 12.5in Forward Complete Upper Assembly Pistol Length 1-7 Twist 5/8-24 TPI Fde/Sniper Green

Bilson Arms BA-15FC 300 Blackout 16in Forward Complete Upper Assembly Mid Length 1-7 Twist 5/8-24 TPI Fde/Sniper Green

LWRC International LWRC ICDI Direct Impingement .300 Blackout 16.1" 1:7" 5/8x24 Bbl Tungsten Grey Complete Upper Receiver ICDIU3TG16

LWRC International LWRC ICDI Direct Impingement .300 Blackout 16.1" 1:7" 5/8x24 Bbl Patriot Brown Complete Upper Receiver ICDIU3PBC16

LWRC International LWRC ICDI Direct Impingement .300 Blackout 16.1" 1:7" 5/8x24 Bbl OD Green Complete Upper Receiver ICDIU3ODG16

LWRC International LWRC ICDI Direct Impingement .300 Blackout 16.1" 1:7" 5/8x24 Bbl FDE Complete Upper Receiver ICDIU3CK16

LWRC International LWRC ICDI Direct Impingement .300 Blackout 16.1" 1:7" 5/8x24 Bbl Black Complete Upper Receiver ICDIU3B16

HIPP Customs AR-15 Stripped Upper Receiver Cerakote Black