Latest build (about 90% complete):
Panzer Arms AR57 16" upper with PA AFAB hybrid muzzle device, BCM short angled pistol foregrip & grip panels, MDT 5-slot rail on RH side, and PA SLx MD-25 red dot. Charging lever was swapped over to LH side. Lower is PSA PA-15 with PSA custom series Match drop in trigger, Reptilia CQC pistol grip, and MFT aluminum minimalist stock. Gutted & converted a 30rd mag into a brass catcher. Weight is just under 6.5lbs.
Have another MDT 5-slot rail coming in for LH side, along with Troy Industries deployable micro HK style iron sights and mount for clip style connector on sling I have. Kind of iffy on the PA red-dot, much prefer their prism sights - so might remove the red dot and only run the irons on it... Was thinking of running the Mepro M21 I have and like, but it's big (takes up all the rail) and heavy and I wanted to run irons as well - no room to mount a rear iron with the M21. Really looking forward to see how this one shoots. Always been interested in the PS90, but only way I'd really want one if it were in full-auto P90 config... fine with semi-auto ARs and nice triggers they can have.
Speaking of triggers, really impressed with the PSA custom series match trigger...absolutely incredible trigger for $90 - nearly everything you want in a high quality a match grade single stage trigger for 1/3 the price. Only thing that separates it is a bit longer reset, but it is a nice very deliberate feeling reset. Highly recommended if you want a high quality SS match trigger for under $100, nearly on par with the Blackout Defense Zero hybrid trigger I have in my Aero M5.