This aftermarket dropin hadguard for your Ruger® AR-556 is a quad rail carbine length drop-in design and upgrades your rifle to add Picatinny tactical accessories. Fits carbine length model M4/AR-15 rifles with standard GI delta ring assembly, barrel nut and round front handguard cap. Features top rail Picatinny mounting platform. Quad rail is made from Aircraft Aluminum with Precision CNC machining and excellent hard black anodizing. Rail has 16 slots on top rail, 16 on bottom, 12 on each side. Fit Length is 6.5"-6.7".
Note: Easy install on most Ruger AR-556 carbine length rifles (un-screw the delta ring as it does not push down like standard delta ring) un-screw it all of the way and removed the stock hand guard. Placed the top piece in and aligned the tapered portions. Placed the bottom piece the same as the top, aligning the tapered portions and the bolt holes. Screwed the Delta ring up until snug. Install 4 allen screws and finish screwing in the Delta ring.
Fits most AR-15 Carbine Rifle, S&W M&P®15 Sport, Bushmaster XM15-E2s, Dpms AR-15 Carbines, and Mil-spec variants also.