Magpul STR Carbine Stock (Mil Spec) - FDE Pistol Hop-Up Rubbers so any standard M4 AEG

so any standard M4 AEG magazine can be used

520rd BB capacity

After the mat begins to accumulate too much dirt

Single pistol ammo pockets include adjustable Hook-and-loop openings with pull tabs

Magpul STR Carbine Stock (Mil Spec) - FDE Pistol Hop-Up Rubbers so any standard M4 AEGThe Magpul STR (Storage Type Restricted) Carbine Stock Mil Spec is a drop in replacement buttstock for AR15 M4 carbines using Mil Spec sized receiver extension tubes. A storage capable version of the CTR, the STR has improved cheek weld and two water resistant battery tubes on a compact, reinforced polymer A frame design. A shielded operation lever and supplemental friction locking system prevent accidental operation and minimize excessive stock