Fully Assembled Complete Bolt Carrier Group that is HP/MPI Tested - Auto Version - Machined to USGI Specifications.
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The SIONICS Bolt Carrier Group - Auto Version - for your AR15, M16 or M4. Parkerized Exterior and Chrome Lined inside the Carrier. Machined to USGI specifications. This M16/M4 Carrier includes the proper Mil-Spec Gas Key. The Gas Key is Chrome Lined and Heat Treated per USGI specifications. The Gas Key is secured to the Carrier with USGI Domestic manufactured Grade 8 Fasteners and properly staked per Military-Specifications. These properly hardened parts insure a strong staking and proper Gas System functioning. The Bolt Assembly is machined from Mil-Spec Carpenter No. 158® Steel, Shot Peened for increased strength and includes Tool Steel machined Extractor and Ejector, HD Sprinco Extractor Spring and is High Pressure Tested and Magnetic Particle Inspected.
Prior to shipping, all SIONICS Bolt Carrier Groups are Test Fired for function. Because of the Test Firing Procedure, the Bolt Carrier Group will show handling marks consistent with these Quality Control Procedures.
Written by the Bureau of Alcohol, Tobacco, Firearms and Explosives (BATFE), Chief of the Firearms Technology Branch - M16 Bolt Carriers are not designed and intended solely and exclusively for use in converting a weapon into a machinegun and are not any combination of parts from which a machinegun can be assembled. Further, an M16 Bolt Carrier is not a firearm as defined in the GCA or a machinegun as defined in the NFA. An M16 Bolt Carrier is simply a Machinegun part and as such its domestic sale and possession is unregulated under the Federal firearms laws. It is not unlawful to utilize a M16 Machinegun bolt carrier in a semiautomatic AR15 type Rifle.