Windham Weaponry CDI Rifle -Gas impingement system with M4 A4 type flat-top receiver constructed of forged 7075 T6 aircraft aluminum. Sixteen inch chrome lined M4 profile barrel with M4 feed ramps and Vortex flash suppressor. 1:9 inch right hand twist. Magpul MOE 6-position telescoping buttstock. Diamondhead free-float forend with Magpul MOE AFG angled grip and Magpul MOE black pistol grip with storage compartment. Diamondhead dual aperture flip-up rear sight and Diamondhead front flip-up sight. Thirty round magazine. Manual safety.Features :Magpul CTR StockMLOK HandguardMBUS PRO SightsMagpul MLOK Hand Stop