question about gen 1 and gen 2 P90

I found a holster maker that offers a P90 holster.
http://www.shtfgear.com/Holster-by-Make/ruger/ACE-1-RUG-P90

but they stipulate "Gen 2" guns

I believe that I purchased mine , when they first came out , so, Gen 1
( I assume)

does anyone have both ?

whats the difference ?

I believe Gen2 is in reference to the type of gear not the gun itself. Notice they have other Gen2 accessories also. A P90 has been a P90 from introduction until being discontinued. Early guns did have the decocker on one side only but I do not believe that is what this holster maker is referencing. Hope that helps!

Mine has the de-cocker.

I guess I will go check their return policy , prior to ordering.

thank you