[towerdog]

Since I haven't had any luck in selling my new in package 10rd MK 23 mags I checked them out on my .45 USP. I figured they're isn't any difference in the dimensions and they slapped in really well. Have any of you ever tried these MK 23's 10rd's on a standard USP .45?

 

[j0n]

I believe both mags are compatible.

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[skullbox]

You can got Mark 23 mags to USP but not the other way around. I put the USP floorplates on a Mark 23 mag but I had to carve out some plastic so it would fit.

 

[HecklerundSauer]

you will have no problems using mk23 mags in a usp. However a baseplate change is needed to use usp mags in a mk23.