Introduced in 2012, ATI's Mil-Sport M4 Carbines became instant hits among customers looking for top quality AR-15 style rifles with forged aluminum receivers. Fine-tuned with many popular features, these American-made beauties perform flawlessly right out of the box at a price anyone can afford. The Mil-Sport M4 KeyMod Carbine features a 10" free-floating KeyMod handguard that allows the right to be fitted by an enormous variety of aftermarket accessories. The 16.1" M4 style barrel is phosphate-coated and has a 1:8 twist. The buttstock is a Rogers Super-Stoc with six positions of adjustment. The rifle is optics-ready with a full-length Picatinny mounting rail. A 30-round 5.56mm NATO magazine is included.