OMG RS16 Receiver Set for MARUI MWS M4 GBB Airsoft

Designed in the K-Style and constructed with CNC aluminum, this receiver set provides a sleek and durable upgrade for your MARUI MWS M4 GBB. Includes: Upper and Lower Receiver ( CNC Machined by 6061 Aluminum, Individual Serial Number is Engraved ) Ambi Bolt Release Lever ( Constructed by Steel in QPQ ) Ambi Mag Release Assembly ( Constructed by Steel in QPQ ) Ambi Selector Assembly ( Constructed by Steel in QPQ ) Front and Rear Take Down Pins ( Constructed by Steel in QPQ ) Dummy Hammer / Auto Sear Pins ( Constructed by Steel in QPQ ) Dummy Chamber Insert ( 6061 Aluminum with Clear Finished )