Fred,
With all due respect I'll call bullshit on your theory. I was issued an M16A1 rifle in basic that was probably used during Vietnam.
I have seen M16A1's in the military that were restamped and converted into M4's and M16A2's. How old do you think those were? Guess what? Pins were not walking loose.
So according to your theory the military should be replacing a lot of lowers because they are after all, "select fire".
KNS pins are a gimmick and they have yet to prove to be a benefit at all. Pins walk loose because the receiver is out of spec, they are assembled incorrectly or the springs are worn out.
Quote:
Originally Posted by Fredmisery
I have actually seen damaged pin holes on a few receivers. If the anodizing wears from the pin holes (usually hammer and sear) the aluminum is softer and the holes can get "egged out" with enough firing. This has been a problem with sear pin holes on converted AR-15's, (legally registered NFA conversions I'm talking about) and a few early manufacturers painted receivers instead of anodizing leaving the surface softer, as anodizing tends to harden the aluminum when done correctly. Granted the guns I have seen this in are all select-fire M16's and not semi-auto AR's and most have been rentals from ranges. Don't see much use for them in a semi-auto weapon, but my M16A1 is a classic and in excellent condition and I shoot the heck out of it, so I use the pins on that platform alone. Considering what the receiver is worth, I'd rather replace pins than have to install bushings in egged out holes.
My $.02
|