AR Buffer Tube or Receiver Extension Jig for 3D printing
grabcad
This is a jig you can print and use to align the buffer tube / receiver extension in relationship of pistol grip. The 3D-model is dimensioned to "mil spec" receiver extensions though in the 3D model picture you see "commercial" receiver extension. Feel free to shave off material. I made this to prevent the misalignment movement while torquing it down.
Download Model from grabcad
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