Alu Endcap for M4 tdc shield

Alu Endcap for M4 tdc shieldCNC 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

with a function rating from 0

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Made from steel

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but i recommend the 4UAD Friction Pro bucking - also from 4UAD

I've tested this engine myself

The elastic sides allows flexible fit that is easy to use

up to 5 selector positions

14mm CCW threading

and it's been noted before that people have tried various designs (for example

All these settings can be adjusted via a handy programming device