Quoted:
Quoted:
3) Keep the gun out of really hot conditions (95 to 105+) if you are going for accuracy. It aint gonna
melt on you, but the upper will flex when heat soaked causing minor POI shifts.
Ted
Now that is interesting.
Moon
Hey Moon, this has been, right from day one, the Achilles heel of the M&P15-22. We owned two of the original
offerings and despite S&W's assurances that there is metal under the polymer in all the key areas it became
obvious that in the upper receiver there wasn't enough. The barrel extension inserts in to the upper like in
any metal gun and the barrel nut tightens down on metal threads. Undeniable, and is as it should be. But that
threaded piece only extends a short distance in the upper and as such, when the polymer is very hot, you
can move the barrel with finger pressure. Maybe this issue has been resolved through revisions, but all of the
people down here that shoot enough to know say they are well aware of the problem. It gets really hot in the Ozarks.
Smith knew about this and that is why they put an end cap on the forearm that has the little pimples that restrain the barrel.
That cap helps with barrel rigidity when things get hot. This becomes an issue when owners swap out forearms and
replace them with free-float types. Goodbye barrel support, S&W never intended the barrel to be without it.
So how does this matter to the average guy who shoots for shits-n-giggles? Probably not much at all. But to someone who
is all into accuracy (yeah, like me), it can result in the loss of a match, formal or informal. That is the story behind the comment.
Ted