Primary Weapons Systems MK107 MOD1-M Upper Receiver .223 Wylde 7.75in bbl Black M107UA01-1F

Primary Weapons Systems MK114 MOD2-M Upper Receiver .223 Wylde 14.5in bbl Pinned FSC556 Compensator Black 2M114UA01-1F

Primary Weapons Systems MK114 MOD2-M Upper Receiver .223 Wylde 14.5in bbl Pinned FSC556 Compensator Black 2M114UA01-1F. 5in Barrel .223 Wylde 3-Setting Adjustable Gas System Specifications for Primary Weapons Systems MK114 MOD 2-M 14.5in bbl .223... ... 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... ... 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... ... more

Primary Weapons Systems MK116 PRO Upper Receiver 16 inch Barrel Matte Black PM116UA01-1F

Primary Weapons Systems MK116 PRO Upper Receiver 16 inch Barrel Matte Black PM116UA01-1F. 56mm NATO and .223 Remington with the Primary Weapons Systems MK116 PRO UPPER .223 WYLDE Receiver These AR15 Upper Receivers will give you the AR15 carbine... ... more

Primary Weapons Systems MK107 MOD 2-M Upper Receiver .223 Wylde 7.75in Pistol Length 1-10 Twist FSC 30 3-Setting Adjustable Gas System Black

Primary Weapons Systems MK107 MOD 2-M Upper Receiver .223 Wylde 7.75in Pistol Length 1-10 Twist FSC 30 3-Setting Adjustable Gas System Black. 75in .223 Wylde Upper Receiver was created to be the ideally suited product for anyone in need of a high... ... more

Primary Weapons Systems MK114 MOD1-M Upper Receiver .223 Wylde 14.5in bbl No Compensator Black M114UA01-2F-NC

Primary Weapons Systems MK114 MOD1-M Upper Receiver .223 Wylde 14.5in bbl No Compensator Black M114UA01-2F-NC. 56mm NATO and .223 Remington with the Primary Weapons Systems MK114 MOD 1-M UPPER .223 WYLDE Upper Receiver These AR15 Upper Receivers... ... more

Primary Weapons Systems MK218 MOD1-M Upper Receiver 18in bbl 6.5 Creedmoor 3-Setting Adjustable Gas System PRC30 Compensator Black M2180UD01-1F

Primary Weapons Systems MK218 MOD1-M Upper Receiver 18in bbl 6.5 Creedmoor 3-Setting Adjustable Gas System PRC30 Compensator Black M2180UD01-1F. 5 Creedmoor 3-Setting Adjustable Gas System PRC30 Compensator Black ... more

Primary Weapons Systems MK116 MOD1-M Upper Receiver 16 inch Barrel .223 Wylde 3-Setting Adjustable Gas System FSC556 Compensator Matte Black

Primary Weapons Systems MK116 MOD1-M Upper Receiver 16 inch Barrel .223 Wylde 3-Setting Adjustable Gas System FSC556 Compensator Matte Black. 223 Wylde Upper Receiver. As a rifle-length upper receiver it is effective at short- medium- and even... ... more

Primary Weapons Systems MK109 MOD 2-M Pistol Upper Receiver .300 AAC Blackout 9.75in Barrel 1-8 Twist Matte Black 2M109UB01-1F

Primary Weapons Systems MK109 MOD 2-M Pistol Upper Receiver .300 AAC Blackout 9.75in Barrel 1-8 Twist Matte Black 2M109UB01-1F. 300 AAC Blackout is a stand-out choice for pistols. If you're looking AR15 Upper Receivers to start your build the... ... more

Primary Weapons Systems MK109 MOD1-M Upper Receiver 9.75 inch Barrel 1-8 Twist Matte Black M109UB01-1F

Primary Weapons Systems MK109 MOD1-M Upper Receiver 9.75 inch Barrel 1-8 Twist Matte Black M109UB01-1F. 300 AAC Blackout check out Primary Weapons Systems MK109 MOD1-M. With a 9.75-inch barrel it is the perfect size for a home defense weapon and a... ... more

Primary Weapons Systems MK116 MOD 2-M Upper Receiver 7.62x39 16.1in 1-10 Twist FSC 30 3-Setting Adjustable Gas System Black 2M116UF01-1F

Primary Weapons Systems MK116 MOD 2-M Upper Receiver 7.62x39 16.1in 1-10 Twist FSC 30 3-Setting Adjustable Gas System Black 2M116UF01-1F. 1in 7.62x39 Upper Receiver then you've found yourself in the right place.. These AR15 Upper Receivers from the... ... more

Primary Weapons Systems MK116 MOD 1-M Upper Receiver 7.62x39 16.1in Pistol Length 1-10 Twist PWS Triad 30 3-Setting Adjustable Gas System Black

Primary Weapons Systems MK116 MOD 1-M Upper Receiver 7.62x39 16.1in Pistol Length 1-10 Twist PWS Triad 30 3-Setting Adjustable Gas System Black. 1in 7.62x39 Upper Receiver then you've found yourself in the right location.. Formulated working with... ... more

Primary Weapons Systems MK111 MOD 2-M Upper Receiver 7.62x39 20.75in 1-10 Twist Black 2M111UF01-1F

Primary Weapons Systems MK111 MOD 2-M Upper Receiver 7.62x39 20.75in 1-10 Twist Black 2M111UF01-1F. While the internals remain the same as other PWS lines the MK1 MOD 2-M offers a variety of features exclusive to this line. Starting with patent... ... more

Primary Weapons Systems MK107 MOD 1-M Upper Rceiver 7.62x39 7.75in 1-10 Twist 3-Setting Adjustable Gas System Black M107UF01-1F

Primary Weapons Systems MK107 MOD 1-M Upper Rceiver 7.62x39 7.75in 1-10 Twist 3-Setting Adjustable Gas System Black M107UF01-1F. 75in 7.62x39 Upper Rceiver. These AR15 Upper Receivers from the expert product specialists at Primary Weapons Systems... ... more