Evolve Weapons Systems Complete Upper Receiver 12.5in Patrol Gas System Quad Rail Black EWS-UCQ-12P-BLK

Primary Weapons Mk114 Mod 2-M 223 Wylde Complete Upper Receiver - Mk114 Mod 2-M 223 Wylde 14.5" Bbl

MK114 MOD 2-M 223 Wylde Complete Upper SPECIFICATIONS: Operating System: PWS Long Stroke Piston System with 3-Setting Adjustable Gas System Caliber: .223 Wylde Barrel Length: 14.5" 41V50 Steel Gas System Length: Mid-Length Barrel Twist Rate: 1:8 Muzzle... ... more

Primary Weapons Mk114 Mod 2-M 223 Wylde Complete Upper Receiver - Mk114 Mod 2-M 223 Wylde 14.5" Bbl

MK114 MOD 2-M 223 Wylde Complete Upper SPECIFICATIONS: Operating System: PWS Long Stroke Piston System with 3-Setting Adjustable Gas System Caliber: .223 Wylde Barrel Length: 14.5" 41V50 Steel Gas System Length: Mid-Length Barrel Twist Rate: 1:8 Muzzle... ... more

Primary Weapons Mk116 Mod 2-M 223 Wylde Complete Upper Receiver - Mk116 Mod 2-M 223 Wylde 16.1" Bbl

MK116 MOD 2-M 223 Wylde Complete Upper SPECIFICATIONS: Operating System: PWS Long Stroke Piston System with 3-Setting Adjustable Gas System Caliber: .223 Wylde Barrel Length: 16.1" 41V50 Steel Gas System Length: Mid-Length Barrel Twist Rate: 1:8 Muzzle... ... more

Evolve Weapons Systems Complete Upper Receiver 14.5in Mid Length Gas System Quad Rail Black EWS-UCQ-14M-BLK

Evolve Weapons Systems Complete Upper Receiver 14.5in Mid Length Gas System Quad Rail Black EWS-UCQ-14M-BLK. 56 Complete Upper Receivers are crafted for superior performance. The 7075 forged upper receiver comes assembled with a forward assist and dust... ... more

Evolve Weapons Systems Complete Upper Receiver 16in Mid Length Gas System Quad Rail Black EWS-UCQ-16M-BLK

Evolve Weapons Systems Complete Upper Receiver 16in Mid Length Gas System Quad Rail Black EWS-UCQ-16M-BLK. 56 Complete Upper Receivers are crafted for superior performance. The 7075 forged upper receiver comes assembled with a forward assist and dust... ... more

Aero Precision Complete Upper Receiver M4E1 Threaded PRO 5.56 12.5in Barrel Gov Profile Mid-Length Gas System 1-7 Twist 1/2 x 28 Thread ATLAS R-ONE

Aero Precision Complete Upper Receiver M4E1 Threaded PRO 5.56 12.5in Barrel Gov Profile Mid-Length Gas System 1-7 Twist 1/2 x 28 Thread ATLAS R-ONE. 56 Cold Hammer Forged Barrel that is paired with our PRO 5.56 BCG. Included ATLAS R-ONE Handguard... ... more

Evolve Weapons Systems Complete Upper Receiver 14.5in Mid Length Gas System M-LOK Handguard Black EWS-UCM-14M-BLK

Evolve Weapons Systems Complete Upper Receiver 14.5in Mid Length Gas System M-LOK Handguard Black EWS-UCM-14M-BLK. 56 Complete Upper Receivers are crafted for superior performance. The 7075 forged upper receiver comes assembled with a forward assist... ... more

Evolve Weapons Systems Complete Upper Receiver 11.5in Carbine Gas System M-LOK Handguard Black EWS-UCM-11C-BLK

Evolve Weapons Systems Complete Upper Receiver 11.5in Carbine Gas System M-LOK Handguard Black EWS-UCM-11C-BLK. 56 Complete Upper Receivers are crafted for superior performance. The 7075 forged upper receiver comes assembled with a forward assist and... ... more

Evolve Weapons Systems Assembled Upper Receiver 16in Mid Length Gas System Quad Rail Black EWS-UAQ-16M-BLK

Evolve Weapons Systems Assembled Upper Receiver 16in Mid Length Gas System Quad Rail Black EWS-UAQ-16M-BLK. 56 Barreled Upper Receivers are crafted for superior performance. The 7075 forged upper receiver comes assembled with a forward assist and dust... ... more

Evolve Weapons Systems Assembled Upper Receiver 14.5in Mid Length Gas System M-LOK Handguard Black EWS-UAM-14M-BLK

Evolve Weapons Systems Assembled Upper Receiver 14.5in Mid Length Gas System M-LOK Handguard Black EWS-UAM-14M-BLK. 56 Barreled Upper Receivers are crafted for superior performance. The 7075 forged upper receiver comes assembled with a forward assist... ... more

Evolve Weapons Systems Assembled Upper Receiver 16in Mid Length Gas System M-LOK Handguard Black EWS-UAM-16M-BLK

Evolve Weapons Systems Assembled Upper Receiver 16in Mid Length Gas System M-LOK Handguard Black EWS-UAM-16M-BLK. 56 Barreled Upper Receivers are crafted for superior performance. The 7075 forged upper receiver comes assembled with a forward assist and... ... more

Primary Weapons Systems MK116 MOD2-M Upper Receiver 16in bbl .223 Wylde 3-Setting Adjustable Gas System FSC556 Compemsator Black 2M116UA01-1F

Primary Weapons Systems MK116 MOD2-M Upper Receiver 16in bbl .223 Wylde 3-Setting Adjustable Gas System FSC556 Compemsator Black 2M116UA01-1F. 1in Barrel Specifications for Primary Weapons Systems MK116 MOD 2-M 16in bbl Upper Receiver: Manufacturer:... ... more

Primary Weapons Systems MK111 MOD 2 Upper Receiver 11.85 in Barrel 11 in KeyMod Rail Triad 556 Black .223 Wylde 2M111UA0B

Primary Weapons Systems MK111 MOD 2 Upper Receiver 11.85 in Barrel 11 in KeyMod Rail Triad 556 Black .223 Wylde 2M111UA0B. The MOD 2 handguard is equipped with the PicMod Technology. This allows you to mount any MLOK attachment anywhere on your rail... ... more

Primary Weapons Systems MK114 MOD2-M Upper Receiver .223 Wylde 14.5in bbl No Compensator Black 2M114UA01-2F-NC

Primary Weapons Systems MK114 MOD2-M Upper Receiver .223 Wylde 14.5in bbl No Compensator Black 2M114UA01-2F-NC. 5in Barrel .223 Wylde 3-Setting Adjustable Gas System Specifications for Primary Weapons Systems MK114 MOD 2-M 14.5in bbl .223 Wylde Upper... ... more

Primary Weapons Systems MK111 MOD1-M Upper Receiver .223 Wylde 11.85in bbl Black M111UA01-1F

Primary Weapons Systems MK111 MOD1-M Upper Receiver .223 Wylde 11.85in bbl Black M111UA01-1F. 85in Barrel .223 Wylde 3-Setting Adjustable Gas System Triad556 Specifications for Primary Weapons Systems MK111 MOD1-M .223 Wylde 11.85in bbl Upper Receiver:... ... more

Dark Storm Industries DS-15 Typhoon Complete Upper Receiver 5.56 NATO 7.5in Barrel M4 Pistol Profile 1-7 Twist 1/2x28 Thread M-Lok Firestorm Type III

Dark Storm Industries DS-15 Typhoon Complete Upper Receiver 5.56 NATO 7.5in Barrel M4 Pistol Profile 1-7 Twist 1/2x28 Thread M-Lok Firestorm Type III. 750 Micro Gas Block andPistol Gas System DSI 7.5" SOCOM 5.56 Threaded 1:7 Nitrite Barrel andDSI... ... more

Iron Horse DMR Complete Upper 5.56 NATO Receiver Black IH-CU1

Iron Horse DMR Complete Upper 5.56 NATO Receiver Black IH-CU1. 5in 7075 hand-guard 7075 billet upper proprietary barrel nut and sleeve for maximum accuracy. Chambered in 5.56 Nato 18in Faxon 1-8T barrel w/ rifle length gas system and adjustable gas... ... more

Daniel Defense Complete Upper Receiver w/ Flash Hider DDM4-V7-LW 5.56mm NATO 16 in Barrel Low Profile Mid 1-7 Twist Free-Floating MFR XS M-LOK Rail 15

Daniel Defense Complete Upper Receiver w/ Flash Hider DDM4-V7-LW 5.56mm NATO 16 in Barrel Low Profile Mid 1-7 Twist Free-Floating MFR XS M-LOK Rail 15. It features a mid-length gas system for smooth reliable cycling and reduced wear on moving parts. A... ... more

Primary Weapons Systems MK111 MOD 1-M Upper Receiver 7.62x39 11.85in Pistol Length 1-10 Twist PWS Triad 30 3-Setting Adjustable Gas System Black

Primary Weapons Systems MK111 MOD 1-M Upper Receiver 7.62x39 11.85in Pistol Length 1-10 Twist PWS Triad 30 3-Setting Adjustable Gas System Black. 85in 7.62x39 Upper Receiver. These AR15 Upper Receivers through the expert product specialists at Primary... ... more

Dark Storm Industries DS-15 Complete Upper 16" Lightning 5.56 Threaded Black 5.56 DSI-UC5-LGT-T5-BLK

Dark Storm Industries DS-15 Complete Upper 16" Lightning 5.56 Threaded Black 5.56 DSI-UC5-LGT-T5-BLK. 750 Micro Gas Block and Carbine Gas System. Specifications for Dark Storm Industries DS-15 16" Lightning 5.56 Upper Receiver: Manufacturer: Dark Storm... ... more

Dark Storm Industries DS-15 Complete Upper 16" Lightning 5.56 Non Threaded Black 5.56 DSI-UC5-LGT-N5-BLK

Dark Storm Industries DS-15 Complete Upper 16" Lightning 5.56 Non Threaded Black 5.56 DSI-UC5-LGT-N5-BLK. 750 Micro Gas Block and Carbine Gas System. Specifications for Dark Storm Industries DS-15 16" Lightning 5.56 Upper Receiver: Manufacturer: Dark... ... more

Angstadt Arms MDP-9 6in Complete Roller Delay Upper Receiver Assembly - Surpressor Ready Black 9mm AAUMDP0906

Angstadt Arms MDP-9 6in Complete Roller Delay Upper Receiver Assembly - Surpressor Ready Black 9mm AAUMDP0906. With a proven roller-delayed action and AR-15 platform compatibility the MDP-9 Complete uppers delivers the ideal weapon system for both... ... more

LWRCI Complete Di Upper Receiver SPR 5.56mm 16 inch Barrel 1-7 Twist Extended M-LOK Handguard Black 16in ICU5B16SPR

LWRCI Complete Di Upper Receiver SPR 5.56mm 16 inch Barrel 1-7 Twist Extended M-LOK Handguard Black 16in ICU5B16SPR. Built on our patented self-regulating short-stroke gas piston system machined from materials that belong to the superalloy family of... ... more

LWRCI Complete Upper Receiver IC 5.56mm 16 inch Barrel 1-7 Twist Extended M-LOK Handguard Black ICEU5B16

LWRCI Complete Upper Receiver IC 5.56mm 16 inch Barrel 1-7 Twist Extended M-LOK Handguard Black ICEU5B16. Built on our patented self-regulating short-stroke gas piston system machined from materials that belong to the superalloy family of steel alloys... ... more

Quarter Circle 10 45 ACP Complete Upper Receiver w/ PMUR 16in Barrel .578-28 15in HG FH Black QC-CU-G45-16

Quarter Circle 10 45 ACP Complete Upper Receiver w/ PMUR 16in Barrel .578-28 15in HG FH Black QC-CU-G45-16. Leader in top of the line dedicated AR15 Pistol Caliber parts. This product is not compatible with DI gas systems or rifle-caliber bolts.... ... more

Quarter Circle 10 45 ACP Complete Upper Receiver w/ PMUR 7.5in Barel .578-28 7.5in HG FH Black QC-CU-G45-7.5

Quarter Circle 10 45 ACP Complete Upper Receiver w/ PMUR 7.5in Barel .578-28 7.5in HG FH Black QC-CU-G45-7.5. Leader in top of the line dedicated AR15 Pistol Caliber parts. This product is not compatible with DI gas systems or rifle-caliber bolts.... ... more

Quarter Circle 10 45 ACP Complete Upper Receiver w/ PMUR 5.5in Barrel .578-28 5.5in HG FH Black QC-CU-G45-5.5

Quarter Circle 10 45 ACP Complete Upper Receiver w/ PMUR 5.5in Barrel .578-28 5.5in HG FH Black QC-CU-G45-5.5. Leader in top of the line dedicated AR15 Pistol Caliber parts. This product is not compatible with DI gas systems or rifle-caliber bolts.... ... more

Jacob Grey Firearms Complete Upper Assembly 5.56 NATO 13in 1-7 Twist 1/2x28 Thread Black 556N13CUA

Jacob Grey Firearms Complete Upper Assembly 5.56 NATO 13in 1-7 Twist 1/2x28 Thread Black 556N13CUA. 56 NATO and built around a 1/7 twist barrel. 7-sided M-LOK Handguard and 7075 Aluminum Upper Receiver. These uppers have a pistol-length gas system that... ... more

Jacob Grey Firearms Complete Upper Assembly 5.56 NATO 10.5in 1-7 Twist 1/2x28 Thread Black 556N105CUA

Jacob Grey Firearms Complete Upper Assembly 5.56 NATO 10.5in 1-7 Twist 1/2x28 Thread Black 556N105CUA. 56 NATO and built around a 1/7 twist barrel. 7-sided M-LOK Handguard and 7075 Aluminum Upper Receiver. These uppers have a pistol-length gas system... ... more

Jacob Grey Firearms Complete Upper Assembly 5.56 NATO 16in 1-7 Twist 1/2x28 Thread Black 556N16CUA

Jacob Grey Firearms Complete Upper Assembly 5.56 NATO 16in 1-7 Twist 1/2x28 Thread Black 556N16CUA. 56 NATO and built around a 1/7 twist barrel. 7-sided M-LOK Handguard and 7075 Aluminum Upper Receiver. These uppers have a pistol-length gas system that... ... more

Jacob Grey Firearms Complete Upper Assembly 5.56 NATO 7.5in 1-7 Twist 1/2x28 Thread Black 556N75CUA

Jacob Grey Firearms Complete Upper Assembly 5.56 NATO 7.5in 1-7 Twist 1/2x28 Thread Black 556N75CUA. 56 NATO and built around a 1/7 twist barrel. 7-sided M-LOK Handguard and 7075 Aluminum Upper Receiver. These uppers have a pistol-length gas system... ... more

Primary Weapons Mk114 Mod 1-M 223 Wylde Complete Upper Receiver - Mk114 Mod 1-M 223 Wylde 14.5" Bbl

MK114 MOD 1-M 223 Wylde Complete Upper Receiver SPECIFICATIONS: Operating System: PWS Long Stroke Piston System, 3 setting Adjustable Gas Regulator Caliber: .223 Wylde Barrel Length: 14.5" 41V50 Steel Gas System Length: Mid-Length Barrel Twist Rate:... ... more

Primary Weapons Mk116 Mod 1-M 7.62x39mm Complete Upper Receiver - Mk116 Mod 1-M 7.62x39mm 16.1" Bbl

MK116 MOD 1-M 7.62x39mm Complete Upper Receiver SPECIFICATIONS: Operating System: PWS Long Stroke Piston System, 3 setting Adjustable Gas Regulator Caliber: 7.62x39 Barrel Length: 16.1" 41V50 Steel Gas System Length: Carbine Barrel Twist Rate: 1:10... ... more

Primary Weapons Mk107 Mod 1-M 223 Wylde Complete Upper Receiver - Mk107 Mod 1-M 223 Wylde 7.75" Bbl

MK107 MOD 1-M 223 Wylde Complete Upper Receiver SPECIFICATIONS: Operating System: PWS Long Stroke Piston System, 3 Setting Adjustable Gas Regulator Caliber: .223 Wylde Barrel Length: 7.75" Gas System Length: Pistol Barrel Twist Rate: 1:8 Muzzle... ... more

Primary Weapons Mk111 Mod 2-M 223 Wylde Complete Upper Receiver - Mk111 Mod 2-M 223 Wylde 11.85" Bbl

MK111 MOD 2-M 223 Wylde Complete Upper SPECIFICATIONS: Operating System: PWS Long Stroke Piston System, 3 setting Adjustable Gas Regulator Caliber: .223 Wylde Barrel Length: 11.85" Gas System Length: Carbine Barrel Twist Rate: 1:8 Muzzle Velocity: 2741... ... more

Primary Weapons Mk1 Alpha Lt 223 Wylde Complete Upper Receiver - Mk1 Alpha Lt 223 Wylde 14.5" Bbl Co

MK1 Alpha LT 7223 Wylde Complete Upper Receiver Alpha Upper System with PWS standard 14.5" 1:8 Twist rate, .223 Wylde Barrel, Adj. Gas System, thread protector (only) with MLOK handguard in Kodiak Brown anodized finish. Anodizing Disclaimer: The... ... more

Quarter Circle 10 45 ACP Complete Upper Receiver w/ PMUR 10.5in Barrel .578-28 10.5in HG FH Black QC-CU-G45-10.5

Quarter Circle 10 45 ACP Complete Upper Receiver w/ PMUR 10.5in Barrel .578-28 10.5in HG FH Black QC-CU-G45-10.5. Leader in top of the line dedicated AR15 Pistol Caliber parts. This product is not compatible with DI gas systems or rifle-caliber bolts.... ... more