The M-15A4 offers the flexibility of the picatinny rail applied to astandard grade .223 caliber rifle, and is available in 7.62X39, or 6.8 MM.Light recoiling and accurate, this is a fine, flexible rifle for lawenforcement. All of Armalites flat top models accept Armalites removablefront sights and carry handles, and other devices conforming to MIL STD1913 (picatinny rail). Comes with one 10 or 30-round magazine, sling,owners manual and limited lifetime warranty.