Colt ar 15 22lr2/12/2023 ![]() One feature that could be the downfall of a good BCG is if the gas key is not properly staked. Remember, cheaper is usually the worst option. The EXO and NP3 coatings have the least amount of issues amongst consumers, so they are probably the best choice. ![]() Sure, any coating will work pretty well on a BCG, so why are EXO and NP3 the best? Because while the other options, such as Black nitride and chrome coating, can do the job, they are known to have some issues. ![]() If a manufacturer has not done this, it means your bolt carrier may actually still have some of those impurities and break down fairly easily. Why is this so important? It means that the manufacturer has tested the Bolt Carrier against some very high-pressure shots and has tried to take out any impurities afterward. Once again, make sure you find one with the following: Shot-Peened and MPI/HPT Tested 22LR Conversion Kit is finding the right Bolt Carrier. We may be repeating ourselves a little bit here, but the most important factor in choosing the right AR-15.
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