i just ordered a m1a scout squad, my reasoning was that with any weapon platform, and especially the m14 platform a certain amount of barrel "wobble" is present, this wobble is caused by moving parts and basic functioning of the weapon, and a shorter barrel is more rigid than a longer one, therefore at shorter ranges the scout just might out preform the full sized version, of course at longer ranges the loss in velocity would become apparent but my reasoning is that the 18" barrel won't suffer performance wise very much and will still provide for a more easy to maneuver weapon, oh and internally they are identical, the scout does come with a top rail for a red dot or reflex sight and a muzzle break (to keep barrel down to aid in follow up shots) and in addition i believe the scout may have a thinner front sight than the standard, not sure on that though