30 carbs, 30-30's, why worry about needing "long range'? IN fact, if all they have is 308 ball and iron sighted FALS or HKs, they STILL don't have as much reach as a scoped shorty AR.
The ball ammo only groups 3" at 100 yds with such guns. 
you can't even see a man, sitting in the open, on a dirt berm, wearing khakis, with the naked eye, at 300 yds, if all he does is hold still. The shorty AR, scoped, snipes quite effectively to 400 yds and hits more than misses at 500 yds, too.
So it's stupid to limit yourself to longer range rifles. you don't need them and to give up the GI rd, the .22 unit, the concealment, the silencer, the luminous sights, the chromed bore and chamber of the AR, all big mistakes.
you can't even see a man, sitting in the open, on a dirt berm, wearing khakis, with the naked eye, at 300 yds, if all he does is hold still. The shorty AR, scoped, snipes quite effectively to 400 yds and hits more than misses at 500 yds, too.
So it's stupid to limit yourself to longer range rifles. you don't need them and to give up the GI rd, the .22 unit, the concealment, the silencer, the luminous sights, the chromed bore and chamber of the AR, all big mistakes.