Magpul STR Carbine Stock
The STR Carbine Stock is a drop-in replacement for the standard M4 stock. An advanced version of the CTR, the STR has improved cheek weld and two water resistant battery tubes on a reinforced polymer A-frame design. A shielded operation lever and a friction locking system prevent accidental operation and eliminate excessive stock movement. The STR incorporates two sling loops, a reversible QD sling mount and a replaceable rubber butt pad.