The M4 AR-15 Upgrade Kit includes a M4 carbine length drop-in quad rail picatinny handguard, A2 front and rear folding flip up sights, and a vertical grip for flat-top optics-ready AR-15 carbine rifles. Fits most Mil-Spec .223 5.56 Carbine Length Rifles, such as the DPMS Oracle, Bushmaster XM-15, S & W M & P 15 Sport II, Palmetto State Armory, Colt M4, Anderson AM-15, Ruger AR 556, and others. This kit includes the following upgrades and accessories: a stanag AR-15 carbine drop-in quad rail constructed of T6 aircraft grade aluminum and is compatible with most AR-15 carbine length direct impingement gas systems. This two-piece drop-in carbine length quad rail is 6.5 inches long and accepts all standard weaver picatinny rail 1913 accessories. The included black polymer vertical grip is compatible with Weaver-Picatinny 1913 and Stanag 4694 rails. The AR15/M4 A2 dual aperture rear sight and gas block height front sight are both folding and made from black hard-anodized aircraft grade aluminum. They automatically lock into position when raised and feature a ball bearing pivot detent for easy adjustment. The sights are quick to detach and easy to use with 0.65 MOA and 0.49 MOA dual aperture.
Fits Most Mil-Spec .223 5.56 Carbine Length Style Rifles Like, DPMS oracle, Bushmaster XM-15 ,S&W M&P 15 Sport II, Palmetto State Armory, Colt M4, Anderson AM-15, Ruger AR 556, etc.
NOTE: This system is designed to work with standard direct gas impingement systems using a standard gas tube and standard round delta ring. Not compatible with triangular retaining plate/cap.