STTi USP (NBB) Rail Adapter

Hello everyone
New airsoft replica for me: STTi USP Match NBB

For the RS version, because H&K have equipped this gun with a proprietary rail I have made a remix of PrintedFirearm (thank for the design) but for this replica which has different dimensions from the RS, of course.

I had to file the inside slightly so that it could be mounted by slightly forcing it, to allow a screwless, so if it doesn't fit on the first try, don't force it, file it down a little and repeat the test ;)

If