Quote:
Originally Posted by diamond_SEA
Im looking to slightly upgrade my SIG552, but i want it to stay CQB friendly.
So far i have tightbore and airsealed nozzle to tighten my groupings.
So if i want to upgrade the stock sig 280 fps with a stronger spring to a mild ~320 fps, should I need to change more internals for such a mild spring? Reshimming and perhaps new bearings might be on my list, but as for cylinder and the like, is it neccessary or can i keep them stock?
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King Arms M100 spring from XT gets me 328 fps in my M733. Forget bearing bushings, plain steel ones will do fine - don't forget to buy shims at the same time you get bushings. Add a bearing spring guide like TC said and you're done - it will run you about $70 for the parts above.