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Aero Precision APAR308503AC Assembled Receiver 308 Win 7075-T6 Aluminum Black Hard Coat Anodized Receiver for M5 Platform

Aero Precision APAR308505AC Assembled Receiver 308 Win 7075-T6 Aluminum Flat Dark Earth Cerakote Receiver for M5 Platform

Aero Precision APAR501801AC Assembled Receiver Multi-Caliber 7075-T6 Aluminum Flat Dark Earth Cerakote Receiver for AR-15

Aero Precision APAR501603AC Assembled Receiver Multi-Caliber 7075-T6 Aluminum Black Anodized Receiver for AR-15

Aero Precision APAR611310AC Assembled XL Receiver 7075-T6 Aluminum Black Anodized Receiver for AR-15

Aero Precision APAR620201AC EPC-9 Threaded Receiver 9mm Luger 7075-T6 Black Anodized Aluminum for AR-Platform

Aero Precision APAR600201AC M4E1 Enhanced Receiver 5.56x45mm NATO 7075-T6 Aluminum Black Anodized Receiver for AR-15

Aero Precision APAR700201C M4E1 Threaded Receiver 5.56x45mm NATO 7075-T6 Aluminum Black Anodized Receiver for AR-15

Aero Precision APAR308506AC M5E1 Enhanced Receiver 308 Win 7075-T6 Aluminum Flat Dark Earth Cerakote Receiver for M5 Platform

Aero Precision APAR501603C Receiver Multi-Caliber 7075-T6 Aluminum Black Anodized for AR-15

Aim Sports AR5CUB3 Complete Upper Assembly 5.56x45mm NATO 16" Black Nitride Barrel 7075-T6 Aluminum Black Hard Coat Anodized Receiver 15" M-LOK Free-Float Handguard for AR-15

Aim Sports AR5CUB5 Complete Build Kit 5.56x45mm NATO 16" Aluminum Black Hard Coat Anodized Receiver for AR-15

Alexander Arms UTA50 Tactical Complete Upper 50 Beowulf 16" Black Cerakote Aluminum Receiver M-LOK Handguard for AR-15

Alexander Arms UTA65 Tactical Complete Upper 6.5 Grendel 16" Black Cerakote Aluminum Receiver M-LOK Handguard for AR-15

Alexander Arms KIT50 Upper Parts Kits 50 Beowulf 16" Black Barrel, Aluminum Black Receiver for AR-15

Black Rain Ordnance BROCARNIVORE450B Carnivore 450 Bushmaster 16" for AR-15

BCM 4URM4 BCM M4 Upper Assembly Multi-Caliber 7075-T6 Aluminum Black Anodized Receiver for AR-15

Bushmaster 0040011BLK Bravo Zulu Complete Upper 5.56x45mm NATO 16" CMV Nitride, Black, Flat Top Aluminum Rec, 14" BFI M-LOK Handgaurd, Snake Charmer Muzzle Brake, Mid-Length Gas, Fits AR-15

Bushmaster 0040008BLK M4 Patrolman's Upper 5.56x45mm NATO 20" Black Rec/Barrel for AR-15

Bushmaster 0040004BLK M4 Patrolman's Upper 5.56x45mm NATO 16" Black Nitride Barrel, 7075-T6 Aluminum Black Receiver, M4 Handguard for AR-Platform

Bushmaster 0040017BLK QRC Complete Upper 5.56x45mm NATO 16" Black Nitride Barrel, Aluminum Black Hard Coat Anodized Receiver, M-LOK Handguard for AR-15

Chiappa Firearms 500093 M4-22 Gen II Pro Upper 22 LR 16" Steel Barrel, Matte Black Polymer Receiver, 7.80" Quad Picatinny Rail For Use With Mil-Spec Lower Receivers Includes 2 28rd Magazines

Chiappa Firearms 500095 M4-22 Gen II Pro Upper 22 LR 16" Steel Barrel, Matte Black Polymer Receiver, 11.80" Quad Picatinny Rail For Use With Mil-Spec Lower Receivers Includes 2 28rd Mags

CMMG 30BC40AAB Resolute MK4 300 Blackout 16.10", Armor Black, M-LOK Free-Float Handguard for AR-Platform (No BCG or Charging Handle)

CMMG 30BC40AMB Resolute MK4 300 Blackout 16.10", Midnight Bronze, M-LOK Free-Float Handguard for AR-Platform (No BCG or Charging Handle)