Not sure what your gun can handle?? Apr 2, 2011 13:07:34 GMT -5 Quote Select PostDeselect PostLink to PostMemberGive GiftBack to Top Post by jhample on Apr 2, 2011 13:07:34 GMT -5 airsoft-club.com/shop/internal-upgrade/springs/jing-gong-jg-aeg-spring-set-m120-m130-m140heres an awesome deal if youre trying to upgrade your spring. you get a 120,130, and 140 spring for $7! test them all to see what you can handle before splurging on a high torque motor/gear set