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Matrix M130 235% Irregular Pitch Airsoft AEG Upgrade Spring (430~520 FPS)
by Moises H. Date Added: December 31, 2012
I installed this springs on several weapons, M14, M4, G36, AK, M5, etc without problems, this spring is strong and after some use just the lost is minimal; my last two updates are in a KWA SR12 is shooting 490 fps, at rof 870 rpm, and a KWA SR10 495 fps at 875 rpm using a regular 9.6 batteries, with a lipo they are crazy hot.

- Strong
- very sturdy material (black finish)
- minimal lost of fps after "break time"
- After 5000 rounds, still in good shape and not deformation
- Diference between shots is +/- 5 fps
- Not at all

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