Re: best mfg. for ar BCG
The Fail Safes are excellent and the ones I have seen run like a scalded dog, but they are damned expensive (roughly $250-300...includes an EXO coated hammer as well). That is roughly twice what most standard carrier groups will run you and unless you are shooting a helluva lot of rounds through your AR, are running F/A, or are completely adverse to properly lubricating your AR, it is hard to justify the additional money in my book.
I would have a hard time justifying the expense over an LMT, Young or similar unit for MUCH cheaper.