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CMMG Barrel Sub-Assembly 55D590A 16.1" 5.56 NATO 416R Stainless Bead Blasted Finish AR-15 Compatible
CMMG Barrel Sub-Assembly 30DC30A 16.1" 300 AAC Blackout 416 Stainless Bead Blasted AR-15
CMMG 38DCC0A Barrel Sub-Assembly 308 Winchester/7.62 NATO 18" Stainless Steel
Rock River Arms AR0598.V1 LAR-15M All Terrain Hunter Complete Upper, 223 Wylde 18" Stainless Heavy Match Barrel, Bl
Rock 350L0326 350 Legend CAR SS Halfhp Upper
Proof Research 100462 AR-Style Barrel 223 Wylde 20" Rifle Length Gas System 1:7" Twist 4 Grooves, 1/2"-28
Rock 450B0461 450 BM MID A4 UPR Half SS Upper
Proof Research PR15 128688 18" 6mm ARC Stainless Steel AR Barrel