NUPROL - M4/15/16 30/125 Rnd N-Mag - Black or Tan,
Lightweight Polymer mid-capacity Airsoft magazine for M4/M16 variant rifles,
Variable Capacity - You can switch between a maximum capacity of 30 or 125 BBs.
To switch between the different BB capacities, simply remove the base plate and the internal section of the magazine to reveal the switch.
Tough Polymer external shell that has ridges and textured grip panels