Yes, sorry I should have explained. I am aware of the restrictions. Going over 400fps with .20s isn't a problem. I'll only be using this one on a private field where I play once a week. As it stands I'm already being out ranged by the other team. I just want to get this rifle up to 400ish without modding much, even bellow 400fps is fine. I would like a bit more power than 350fps on .20s (which is still pretty good).
Will this gun's stock internals (particularly it's bushings) take a Prometheus MS120 spring (which is comparable to a PDI 170%) without any other upgrades?
As an aside, I was also looking at some of 007's pre-upgraded guns, firing at 410fps and Airsoftkelowna's; also firing above 400fps. They have significantly upgraded parts: reinforced gears, PDI 170% spring, bushings, piston & head. So I'm also kind of looking at an upgraded G&P M4A1...but I already have an M4 and wanted something a bit longer for better groupings etc.
Thanks.
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