G&P M4A1 12inch Aluminum Outer Barrel (Silver) G style Reference the APC sizing chart

Reference the APC sizing chart for correct fitting

and come with the steel outter barrel

MOSFET for ASK AK AEG (V3 Gear Box)

The PTS Mega Arms MKM GBBR series of guns are variation based on the M4/AR-15 platform

5-Position Stubby Buttstock

G&P M4A1 12inch Aluminum Outer Barrel (Silver) G style Reference the APC sizing chartReinforced Aluminum Constructed One Piece Outer Barrel Suitable for M4A1 Series Airsoft Electric Gun AEG Rifle Fit for G&P Front Set RAS series to install with Tokyo Marui Barrel tip end has Clockwise 14mm Thread Super rigid construction for high end upgrade user SKU GP COP007S Item Weight (gram) 230 Major Color Silver Length 300mm Adaptive End 14mm Clockwise Built Material Aluminum Manufacturer G&P