Yes. The entire USP series guns have interchangeable parts. The Expert, Elite, and Match are all build on the same USP platform. The 9 and 40 use the same frame, while the 45 uses a different frame. This only applies to the fullsize guns.
Me and my friend, we have exchanged USP Expert frame with USP Standard frame, slides too.
I have fallen in love with USP Expert frame (match trigger and the best of - JetFunnel). So I've ordered JetFunnel for my USP Standard.
I was curious about better filling of shooting with USP Expert. I know now why.
The secret is JetFunnel - with it you have better grip - for me
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