Pick the wrong AR-15 buffer weight and the rifle tells on you: brass thrown three feet forward, a bolt that short-strokes on cheap ammo, or a snappy recoil impulse that fights your follow-up shots. Buffer weight is the cheapest, most reversible way to tune how an AR runs, but the "use the heaviest buffer that still cycles reliably" rule everyone repeats only works once you unde …
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If you already own a 5.56 AR-15 and you're eyeing 300 Blackout, the real question is what you can keep and what you have to replace. The answer is cleaner than most forum threads make it: your bolt carrier group, lower, buffer, and magazines all carry over. Only the barrel and gas system change. Everything else about a 300 BLK upper is identical to your 5.56 rifle. The short an …
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The Glock 19X and Glock 45 confuse buyers the moment they start shopping for a new slide, because both pistols break the usual "full-size or compact" rule. They pair a full-size Glock 17-length frame with a compact Glock 19-length slide and barrel. That crossover is the whole point of the design, but it also means half the slides and parts you find online are the wrong length o …
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