Last week my Dad, and I took our M1A1 out to sight in, as this was the first time since we had it that it was decent enough to shoot. He started out, and couldn't hit anything, anf then towards the end we decided it was shooting way high, even though the rear sight was all the way down. We tried everything, and it just kept shooting way high. So as we were putting it away we discovered copper "tracks" accross the bottom of the flash supressor/ front sight. So he took it off and had a machinist gauge it, and found it to be way off, that explains the copper, and the way high, as it seems the bullets were "ramping" off the end. So he machined the suppressor off, so we still had the front sight. Today he stopped by and we went out and this thing is dead nuts now, I have never been this accurate with iron sights before at any distance, let alone 300 yards. My question is this has anybody had a problem with their suppressors, and also what is the "best" on on the market. Thanks...