Don't get the G-spec version, get the regular length BAR-10. The regular BAR-10 has a longer barrel, WILL accept the free mods - unlike the G-spec version, which I've heard does not accept them all that well - etc, etc... I have the JG BAR-10 with the free mods done to it by another guy and it shoots incredible with .3g bbs!! I am about to purchase a dbc barrel as well, should make it shoot even better!!! Buy some KSC .3g bbs, and drop the sling.
Collin
Collin