I have settled on the configuration for my Poor mans assault rifle. A Remington 7400 Semi-auto carbine. Caliber .30-06. 18" barrel. Choate stock. Eagle 10 round magazines. BSA red dot sight. 1 1/2 groups at 100 yards. Eats any -06 ammo I feed it from 125 gr spire points to 200 gr. round nose. Did a trigger job this weekend. The trigger is basically the same set up as an 870 or 1100 so it is not the best for precision rifle work. Smoothed out nicely with stones and crocus cloth on a knife edge (sear engagement is not square, but hooked. The only real issue I have with it is you must pull the barrel to remove the bolt carrier group. I found a company in Colorado (remington7400.com) that specializes in these rifles. Next step is to have then thread the barrel and install an M-16 type flash hider (muzzle blast from that 18" bbl is pretty significant).