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The bolt is 5
This is a Nitride QPQ 7
Prime Weaponry’s M16 Titanium Nitride Bolt Carrier Group
For use with both Glock and Colt pattern lowers
Finish - Titanium Nitride
.458 SOCOM / 450 Bushmaster Bolt Carrier Group Nitride QPQ 458bcg The bolt is 5This is our 458 SOCOM 450 Bushmaster Bolt Carrier Group. This has the M16 Full Auto rated Carrier with an S7 Tool Steel Extractor for not only reliability but long lasting performance. This is a Mil Spec Bolt Carrier Group treated with our Nitride QPQ process having an overall hardness of 75 Rockwell. 8620 Steel Carrier 9310 Vac Arc Steel Bolt 4340 Steel Cam Pin S7 Tool Steel Extractor 4140 Steel gas Key Mil Spec Spring kit MPI (Magnetic Particle
