You are viewing a Heckler & Koch HK 416/MR556 OTB (Over The Beach) Buffer Tube/Receiver Extension. (Commercial).

Genuine HK German manufactured 416, MR556 new style latest generation marine environment over the beach buffer tube.

The Commercial buffer tube has built in drainage holes in the rear of the tube and also on the bottom for maximize efficiency. Each buffer tube has ball bearing rollers to tighten the stock when locked in position. This helps smooth the sliding action when changing between the 6 positions that also eliminates any back and forth sway from the stock.

Will fit the following:

All HK 416/MR556 E1 or E2 Commercial stocks (I carry E1 stocks if you need one)

Any Commercial AR-15 stock