What is the difference between Full Auto Bolt Carrier Group and standard BCG?
A full-auto bolt carrier group (BCG) is a component of an automatic firearm that performs the key task of chambering a round and firing it. It is typically composed of three parts: the bolt, the bolt carrier, and the firing pin.
The bolt is a cylindrical component that is inserted into the gun’s barrel. It houses the cartridge and has locking lugs on its front that lock into corresponding recesses in the barrel extension to form a tight seal. The bolt carrier sits on top of the bolt and contains recoil springs and guide rods that help propel it rearward upon firing. The firing pin is a slender rod located at the rear of the BCG that projects through a small hole in the Bolt Carrier and strikes the primer of the chambered cartridge to set off the round.
1 – (above) – Full Auto Capable TR-BCA
2 – (below) – Semi Auto TR-BCA-SEMI