If the Ultimac or the redneck engineer adapter were live…
Might this work
PRODUCTION HAS RESUMED AND GEN 2 KITS ARE SHIPPING! Ammunition is finally available so we have resumed production of the AM15 UPPER RECEIVER KITS once again. We are in the process of assembling and machining additional parts to satisfy customer demand based on the cur
www.tacticalinc.com
They have been out of stock for years. This would not work with the UltiMac. The UltiMac is basically a Lage Max-10/15 style upper with modular magwells.
The AM15 should work with a Tenko 10-16 open bolt model that we should be submitting soon. I have acquired a first generation AM15 upper. I am still waiting for the for the "upgrade " kit to become back in stock. I know someone with the second generation AM15 and it runs well for him.
Only Craig Wheatley (the owner of Tactical Innovations) knows why a Mac style American 180 upper hasn't come to market. In looking at the AM15, I would think that the mechanism should be easily adapted to the Mac style family of RRs. It would seem that Craig doesn't think that the "juice isn't worth the squeeze" or the upper would be in the marketplace. But I don't know that for a fact.
Scott