Alu Endcap for M4 Color:Silver and is not installed during

and is not installed during use

now featuring a precision machined low friction plastic ring to replace the top o-ring

Upgraded Aluminium CNC parts for CRBN uppers by Airtac Customs

Made from machined aluminium with a nice black anodized finish

You will need to wire your own switches

Alu Endcap for M4 Color:Silver and is not installed duringCNC Aluminium endcap for M4 The Airtac Customs USA CNC Aluminium endcap is specifically designed to fit G&G M4 lower receivers. It replaces the original stock to provide a nice, matching cover for the rear of the lower receiver. The endcap includes a bolt and screw to hold the spring guide inside the gearbox a vital function for AEGs. This endcap is especially good when combined with grip stock bottle HPA builds. Compatibility notes: Will fit most AEG