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JP Enterprises GEN 2 AR15 Silent Captured Spring Builder Kit with 5 Alternative Spring Pack -Heavy VersionJPSCS2-15K-H2 3 300:-  
JP Enterprises GEN 2 AR15 Silent Captured Spring Builder Kit with 5 Alternative Spring Pack -Standard VersionJPSCS2-15K 2 900:-  
JP Enterprises GEN 2 AR-10 Silent Captured Spring Builder with Alternative Spring Pack-Heavy H2 VersionJPSCS2-10K-H2 3 500:-  
JP Enterprises 9mm bolt assemblyJPBC-9MMA 4 550:-  
Quarter Circle 10 AR9 Rear Chargeing Upper ReceiverQC-PRCU-S 3 395:-  
KAK SIG MPX BUFFER TUBE ADAPTER ONLYKAKSIGMPX-ADAP 960:-  
Quarter Circle 10 Colt 9mm Lower Receiver -CLT9MM AR15-16QC10CLT9B 4 465:-  
Rainier Arms 9MM Billet Receiver Set - BlackAR15-63+16RA9B 6 600:-  
Quarter Circle 10 AR9 MUR Upper ReceiverQC-PMUR-S 3 000:-  
Quarter Circle 10 AR9 Side Charge Upper Receiver QC-PSCU-S 4 690:-  
Quarter Circle 10 AR9 Upper and Lower Receiver MP5AR15-63-16QC10MP5 7 495:-  
Quarter Circle 10 Glock LARGE Frame Lower ReceiverAR15-16QC10GLFB 4 465:-  
 QC10QC5MP5LOW 5 500:-  
Quarter Circle 10 Glock SMALL Frame Lower ReceiverAR15-16QC10GSFB 4 465:-  
Quarter Circle 10 9MM Glock Cut Bolt AssemblyAR15-80QC10919G 4 250:-  
Quarter Circle 10 AR9 Barrel 9x19AR15-BQC1091916 3 200:-