Three others in process.

PSA PA-10 Carbine Lower
PSA PA-10 Rifle Lower
PSA PA-9 SBR Lower (10.5" registered length, just waiting on the right PSA upper to come available)

Eventually, these will all look like the PA-15s and the LE6920. ACS stocks, MIAD grips, MOE hand guards, MBUS Pro BUIS, etc., etc.