Matt Mink of team CZ-USA..has been playing around with getting the SP01 to make weight for SSP..once legal for SSP it would be legal for ESP..
here is the thread on CZshooters..
www.czshooters.com/module...pic&t=1310by changing out to some 75b parts..you can get the gun to under the 39ounce weight limit..it takes starting with a 06 ( three rail slot ) SP01.
I took a current model 3 slot SP-01 DA/SA and did these things:
1. Replace the stock rubber grips with 75B plastic grips.
2. Replace the slide stop with 75B slide stop.
3. Replace the mainspring plug with a 75B mainspring plug.
4. Replace the flat wound recoil spring with a 75B wire wound spring. You can also use a Wolff spring.
5. Do not use the SP-01 magazine, use the older style 16rd 75B mags with the detents in the bottom of the tube.