It's a WETTI part. I got my camera sorted out...I'll try to take some comparison pictures and post them. (NOTE...figured out the previous firing issue...edited my last post with notes)
So...theoretically, the RA-Tech WETTI NPAS Adjustable SCAR nozzle should "drop" right in, if you have the matching chamber to go with it.
Pic#1/#2 - Top to bottom
- Stock WE AWSS M4 Nozzle (note it has one of my custom valves in it)
- Stock WE AWSS SCAR Nozzle (mounted in M4 bolt
- misc handmade valves (different ports and bore hole sizes...brass)
- bottom left in Pic#1...threaded spacer to fit on rod behind float valve
- center - stock float valve with threaded screw for adjustment
Pic#3 - SCAR nozzle fit (doesn't fit all the way in) into stock M4 Chamber, notice nozzle setback
Pic#4 - stock M4 AWSS nozzle fit into stock M4 chamber, seated fully. If you look really closely at the top nozzle...through the inlet hole, you'll see a bit of a handmade float valve.