An RMR-cut slide for a Glock 17 or Glock 19 will accept dozens of different optics, and the price spread between the cheapest and the most expensive runs past ten to one. That range is the actual problem: nothing on the shelf is obviously wrong, and the things that separate an entry-tier dot from a duty-grade one — housing rigidity, dot crispness under recoil, how the ele …
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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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