Quoted: Picked up an AR-15 SP2 for $1100 w/ 1 30 rd mag. On the end of the barrel is CMP 1:7. Was the price good or just competitive?
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Not bad.
Probably you have a 1 in 7 twist barrel.
Prepare to shoot heavier (longer) bullets.
(I learned this info (longer) from Troy and Forest !)
Probably you'll want to pick-up some 20-round mags.