I just got and installed one of these Buck Rail 1377/1322 Adapter/Suppressor.For use with the standard barrel length only, mouse fart quiet and adapter to replace stock barrel holder/sight is heavy duty.It is better than the the average from Buck-Rail - which is high in my opinion.Already ordered two more.https://buck-rail.com/product/crosman-13xx-silencer-kit/
I got one for my 2100. The adaptor replaces the front sight/barrel bushing on the 2100 and it was a press fit.Kinda disappointed with the suppressor though. Now the gun makes this lame spring sound that you can barely hear.