Inter manufacttor compatibility

I put my 580cc FX bottle from my Impact on my SK-19 so yes. That was a carbon fiber bottle. Pyramyd Air says the Aluminum 500cc bottle w/valve fits the Impact so it would fit the SK-19 as well.

https://www.pyramydair.com/s/a/FX_500cc_Standard_Bottle_w_Valve/9076

Max pressure is 3150psi on the 500cc aluminum bottle so way less shots than the carbon fiber units and less shots is probly not what you want on an automatic air rifle.