Geissele Reliability Enhanced Bolt Carrier 5.56 with Gas Key

Geissele's Reliability Enhanced Bolt Carrier is a full mass M16/M4 pattern carrier for 5.56 rifles. The gas key comes properly torqued and staked, and it is chrome lined and Nanoweapon coated. The carrier body is Nanoweapon coated as well, for corrosion and wear resistance.

The extended upper rails are the change to the part: Geissele credits them with much greater stability and a large increase in feeding reliability. Every carrier is high pressure tested and magnetic particle inspected. It is rated for full auto use.