Premium Bolt Carrier Group Gen 2

Description

Umbrella Corporation AR-15 Bolt Carrier Groups are our take on a premium, no snake oil, combat ready BCG. Each and every bolt is proof fired, ultrasonically cleaned, tested via magnetic particle inspection (MPI), and once certified, parkerized for corrosion protection and lube retention. In keeping with a superior product, we don’t utilize a Crane O-Ring as a crutch to increase extractor tension. Instead, our bolts are built with a mil-spec black insert coupled with a Tactical Springs 5-coil high load extractor spring that’s compatible with all DI gas system lengths. It’s rated for 150K+ cycles to outlast your rifle barrel many times over. We have improved on the finish requirement of the TDP and have chosen the best materials of those allowed per spec, not the lowest cost like nearly all of our competitors. This second gen product is manufactured to the highest standards with an unconditional guarantee against material defect and manufacturing failure. We challenge you to compare our Bolt Carrier Group specs against the competition. Beyond using Carpenter’s 158 alloy for the bolt, ask what alloy they use for their extractors, Extractor pins, ejectors, and whether their cam pins have a solid film lube per TDP. You will likely find they don’t advertise any of these specifications. And don’t fall for the 9310 alloy bolt substitute; it is a less expensive, inferior alloy for this application. Bought into the hype and don’t believe us? Ask Carpenter Tech; they manufacture both materials and will without hesitation tell you 158 is the proper, superior alloy. The draw for 9310 is that it’s a decent material when heat treated properly though since there’s no spec, how do you know what “proper” might be for this application? It’s less costly, and you don’t have to buy mill run quantities for manufacturing. It’s the little things that make the real difference and we cut no corners with our Bolt Carrier Groups. Assembly/function check by a qualified Armorer is required.

Additional information