1. “Why do manufactures use them in there product?”

    I know this makes me trust STI’s quality control.

  2. I remember when LMT changed their gas keys to MIM, everyone on Arfcom freaked the hell out.

    I am running a LMT 14.5″ upper, and even with a M4-2000 can attached, have had no issues with it with monthly USPSA style rifle matches and a Magpul class under its belt

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