This Bolt Carrier Group comes fully assembled by St. Croix Tactical for your AR15, M16, or M4. 100% titanium carrier with a Nickel Boron gas key staked that weighs 5.6 vs. 10.7 ounces with the mil-spec carrier and mil-spec gas key. We machine these carriers to mil-spec standards just replacing the material with an aircraft quality titanium (6AL-4V).
With this BCG you will NOT have to use an adjustable gas system, heavier buffer, or a heavier buffer spring. Simply remove your current BCG and replace it with the titanium BCG and feel the difference right away. Less recoil, rapid and smooth cycling, and lower temperatures during use are all benefits of this BCG.