shuty ap9 quadrail

The bi rail stl in no longer needed for this part. I left it in on case someone wants it.
.Consider this part for educational purposes only until you do your own testing.

Could also possibly be used as a barrel cooler by stuffing a wet rag in the end to keep the pla from over heating!

update: 9/3 added version 2 which includes longer body and 3 screw mount holes. 2 of which go into the upper which should help reinforce the barrel retainer.

9/7: added version 3 that eliminates the barr