Would like to sell or trade my AR15M4 Piston carbine. The upper is a Adams Arms M4 flat top with 16 inch chromelined barrel with Piston system. The lower is Armalite with DPMS 6 position stock. The base-rings are the new Burris Tactical one piece and the scope is Bushnell 3200 4-12-40 AO with a varmint retical. I have around 100 rounds through it. The first reload I tried shot 1/2 inch at 100 yards so that is what I shoot varmints with. The load is 50 grain NBT doing 3150 fps. This rifle is only 6 months old and is in 99.5% in my opinion. The piston system is real awesome for the guy that wants to hunt yotes all year with only one gun cleaning. With the piston system there is no blowback in your face nor in the receiver. Will sell for$1225 OBO+shipping or trade for Custom action,barrels,stocks, optics or long range rifle. Feel free to call 208-467-0334 my name is Brian.