Smyth Busters - AR Ar-10 Bolt Carrier Group
Complete Mk3 bolt carrier group - Bolt: 9310 Steel Phosphate Finish - Carrier: 8620 Steel Chrome Lined Phosphate Finish - Extractor: S7 Tool Steel Phosphate Check alignment of bolt to barrel extension. Have you checked head space? Too tight of head space will cause it to jam. 3 wks. Other posts. DPMS actually makes a solid phosphated chrome lined 308 bcg, lots of people recommend that one, like Mega Arms. I used a DPMS chrome lined ...