Complete Upper Receivers

Primary Weapons Systems .223 Wylde MK1 MOD 2-M Complete Upper - 7.75"

Primary Weapons Systems .223 Wylde MK116 MOD 1-M Complete Upper - 16.1"

Primary Weapons Systems 300 BLK MK1 MOD 2-M Complete Upper - 9.75"

Primary Weapons Systems 300 BLK MK109 MOD 1-M Complete Upper - 9.75"

Primary Weapons Systems MK111 MOD 1-M .223 Wylde Complete Upper - 11.85"

Q LLC Sugar Weasel Upper 300BLK 13"

Q LLC Sugar Weasel Upper 5.56 NATO 13"

Quarter Circle 10 Complete AR-15 9mm PCC Upper - 5.5"

Quarter Circle 10 Complete AR-15 9mm PCC Upper

Quarter Circle 10 Complete Side Charging AR-15 9mm PCC Upper

R&D Precision 9mm PW9 Bufferless Upper Kit – V1

R&D Precision 9mm PW9 Bufferless Upper Kit – V2

R&D Precision 9mm PW9-R Bufferless Upper Kit – 16"

Rainier Arms / Rellim Arms AR-15 .223 Wylde Take Down Upper Receiver Assembly - 8.5"

Rainier Arms / Rellim Arms AR-15 300BLK Take Down Upper Receiver Assembly - 8"

Rainier Arms / Rellim Arms AR-15 5.56 NATO Take Down Upper Receiver Assembly - 16"