Arcturus AR MOD1 M4/M16 30/130rd Variable-Cap Windowed EMM Magazine Tan Receiver Misc Parts Nylon Polymer stock with micro-texturing

Nylon Polymer stock with micro-texturing

Additionally stabilized nozzle ensures FPS consistency and eliminates Mid-cap syndrome

if you want 400 FPS

410 fps ( +/- 10% )

The Kinetic MREX™ Modular Receiver Extension is designed to be simple

Arcturus AR MOD1 M4/M16 30/130rd Variable-Cap Windowed EMM Magazine Tan Receiver Misc Parts Nylon Polymer stock with micro-texturingENHANCED CONSTRUCTION One Piece Reinforced Magazine Shell MODULAR INTERNAL Easy Disassembly for Cleaning & Maintenance MODULAR SHELL Quick Replacement for Optional Shells VARIOUS CAPACITY Switchable Mid Real Capacity Or High Capacity LENGTHENED FOLLOWER Snag Free & Reduce BB Waste IMPACT ABSORBING DESIGN For Outstanding Reliability REINFORCED MATERIAL For Long Lasting Durability SPECIFICATION Compatible: M4 M16 Construction: Polymer Capacity: 30 Round