Please excuse me if these have already been addressed, but I couldn't find the answers anywhere.
16" Barrel vs 20" Barrel:
I really like the compactness of the 16" barrel, so what are the advantages of a 20" barrel over a 16". I really don't ever expect to shoot anything more than 150-200 yrds. That would be the occasional varmint (coyote, fox, wild dog, etc.). I'll probably be using Q3131A (I can get by Bass Pro or Galyans easily when it's on sale). I'm guessing at these distances, both barrels would pretty much perform the same.
A2 Upper vs A4 Upper:
I'm also considering getting an upper with the A4 receiver and a gas block for a removable front sight. I really like the traditional A2 upper look, but would like to be able to remove the carry handle and front sight and mount a scope. My question is, once I sight in the removable carry handle and front sight, if I take them off and then reattach them, will they hold zero.
Does any one have any experience with Model 1 Sales uppers?
Thanks