Product Description
MCS AR-15 UPPER RECEIVER WITH BOLT CARRIER & CHARGING HANDLE COMBO - 5.56X45MM
An AR-15 bolt carrier group is a piece of a firearm that houses many important parts such as the firing pin, gas key, cam pin, extractor, and bolt. With all these pieces working together the BCG can grab and feed another round out of a detachable magazine, chambers and engages the cam groove, engage with the locking lugs in the barrel, fire, and extract a spent cartridge.
During the extraction of a cartridge, the BCG works to absorb the force of the explosion by expanding gas in the carrier. During this process gas is tapped off from the barrel and is sent into the cup inside of the gas key, creating an inertial force that sends the Bolt Carrier Group back into the buffer tube which helps to minimize the recoil of your gun when firing and the cycle will repeat for subsequent shots.
Includes:
- MCS 5.56x45mm Bolt Carrier Group
- MCS AR-15 Mil-Spec Charging Handle
- MCS Mil-Spec AR-15 Upper w/ M4 Feedramps - 7075 T6 Aluminum
- MCS AR-15 Ejection Port Door, Rod and Spring
- MCS Forward Assist Assembly AR-15
