Working with a friend of mine to build on that will work that matches better than an Armalite (I like running the KAC URX's) Just trying to see if people would be interested in it so we can make a batch after the prototype. Armalite used to make them but stopped in 2003 or 2004. It's basically just a Armalite slick side with the KAC /DPMS thread pattern for the barrel nut. Planning on making them out of 7075 T-651 and having them Type 3's with dry lube on the inside.