ok, first off, i love my mini-30 to death. i don't want to get rid of it. BUT, it hardly ever efects the shell case all the way, the mags i got are very loose and move back and forth, and the screws fall out of the sight....ok, i found some 20rd mags for like $20 the protrusion that sticks up against the mag release does'nt go all the way up to the end of the mag. should it? if so i can fix that myself...second where can i find a heavier barrel? and third how much does it cost, and will it increase accuracy?