HK 416 MR556 Receiver Extension Complete Tan/RAL8000

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

Compatible With:

• All HK 416/MR556 E1 or E2 commercial stocks
• Any commercial AR-15 stock