BBF Airsoft M4 Upper Receiver Shim Kit For Tokyo Marui MWS GBB Airsoft Rifle Net-Weight-(g)_362 Ball bearings in the motor

Ball bearings in the motor provide stability and reduce friction

Realistic blowback action to simulate recoil

Engraved Realistic Marking on Slide & Frame

GSR Pro Strap - The GSR Pro-Strap is a quantum leap in strap design and security

BBF Airsoft M4 Upper Receiver Shim Kit For Tokyo Marui MWS GBB Airsoft Rifle Net-Weight-(g)_362 Ball bearings in the motorBBF Airsoft AM4 Upper Receiver Shim Kit For Marui MWS GBB Airsoft Rifle Metal Construction Airsoft Upper Receiver Shim Kit A receiver shim kit is a set of shims that are used to adjust the fit of a your Airsoft Gun receiver to the stock or the barrel Various thicknesses to allow for precise adjustments The receiver shim kit is often used to correct misalignment between the receiver and the stock, or to improve the overall fit of the firearm for better