Complete Bushmaster XM-15ES. M4 configuration, 16" Chrome lined barrel, Flat Top. Chambered for .223/5.56 with a 1:9 Twist. Extras include: Troy MRF 13" Free Float Quad Rail Magpul MIAD grip (I have the extra backstraps as well) G2 Flash Hider Removable Front Sight Bipod 4 metal, C-Mag Products 30 round mags, and a MOLLE 4 Magazine - Mag Pouch included as well. This rifle has had somewhere around 1,000 rounds put through it, and it's always functioned flawlessly. The gas system was not touched when installing the rail. The original A2 FSB was just cut/ground down. I'm selling to fund a precision long range rifle build. $1600 SPF to CheckmateMotorsports FTF in Hillsboro Oregon. PM Me any questions, or if you're interested.