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Matrix M110 150% Irregular Pitch Airsoft AEG Upgrade Spring (330~390 FPS)
by collin m. Date Added: May 12, 2010
I have purchased 3 of these spring and have received mixed results. I first purchased this spring for my m249 as a slight increase over my m90 so my piston would keep up with the gears, i went from 320fps to 435fps. second I purchased this spring to do an upgrade for a friend, 350fps. third was my most amazing, i got this spring for my RPK which i planed on it shooting 350ish fps. i installed this and i am now getting 470fps. these springs are not good for precise upgrades. however, for how long I have used them they keep their power very well.

good spring, mixed results

Rating: 4 of 5 Stars! [4 of 5 Stars!]
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