Re: disco mods how much will shorter barrel affect fps and fpe?

in my experience a crosman barrel usually performs better with a cut and crown job
as far as loss in fps from what i have seen its around -10fps per inch removed
adding a p-rod trigger group to your disco you will lose the stock,a 1399 stock would be needed
alternative is to use a marauder trigger group.iirc you lose the trigger guard
with either trigger group the hammer either has to be modded ,custom made or
use the p-rod hammer/striker