We have completed our intial tests for the Mossy Creek Arms AR-15 Model 1542.  By the way, anyone know what the 1542 means?  We have done our intial function testing to see if it will feed all types of ammo with different mags.  Our AR will have the Magpul Mags, which we think are the best, but the gun needs to run anything.  we also have some of the nasiest ammo, that still ran.  This is exactly what we want.  We are trying to build the best...