Bronty Posted April 24, 2019 Report Share Posted April 24, 2019 Hi I want to build a GHK M4 from scratch. What spec buffer tubes, receivers and barrel nut does it take? From what I understand, you can modify a WA barrel to fit, and it uses a WA barrel nut thread? I'd like a VLTOR style upper but I'm not sure if it's WA compatible? Link to post Share on other sites
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