I have had an extra lower receiver parts kit since I built my first AR a couple of months ago. (Had a chance to buy a second kit at a decent price at the time so I got an extra.) My question now is if I decide to build a 6.8 caliber or .308 AR, will this kit work or are they caliber specific? The brand of kit is STAG. Thanks for all your guys' help. My first project is shaping up nicely.
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