Hi Warren, You should be able to since the Mossberg 930 SPX comes with a pistol grip too. glocktalk.com/threads/finally-a-moss-930-spx-owner-and-stock-conversion.1318564/ If you feel my answer is helpful please click the green box stating it as the best answer. We are rated on our answers and are just volunteers. Thank you!

I'm pretty sure generic tactical grips are out there for it. It has a pistol grip with a buttstock. EBay is where you can find an item # or brand name.

pistol grip NO pistol grip stock YES

The 2nd paragraph, under the nice picture in the provided link below, sums up nicely what I am speaking about Warren. If this were a "pump" you would have no issues doing this.

https://mesatactical.com/mossberg-930-accessories/

Warren, I think you mean to just a pistol grip. right? No, the method of operation of the firearm does not really allow for a "pistol grip only". There is a tube that contains a spring and rod that is contained within the normal stock. If you took away the stock, you risk damaging this tube and rendering the gun inoperable.