Geissele Automatics was established in 2004 as a manufacturer of trigger mechanisms for the AR15 rifle. Rely on Geissele when you expect superior performance, quality, and reliability. Sourced from a Tier 1 supplier of the M4A1 carbine, this 5.56mm complete bolt carrier group is manufactured to the stringiest of military standards. Being off the same production line as bolt carrier groups found in carbines throughout the entire Department of Defense, these components are both high quality and highly reliable. The bolt carrier is manufactured out of 8620 steel with a chrome lined gas key and bolt recess in accordance with MIL-spec standards, and the bolts are produced out of Carpenter 158 also in accordance with MIL-spec standards. The gas keys are all properly torqued and staked, again in accordance with MIL-spec standards. All bolts have been high pressure tested (HPT) and mag particle inspected (MPI), exceeding the MIL-spec standard. Geissele also utilizes the latest revision extractor spring, O-ring and insert, which maximizes the reliability of the bolt carrier group. This ensures positive ignition and extraction of all types of ammunition, including military surplus ammunition known to have hardened primers.
Specifications and Features:
Caliber: 5.56 NATO
Black Phosphate Finish
Carrier Material: 8620 Steel
Bolt material: Carpenter 158 Steel
Chrome Lined Gas Key and Bolt Recess