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Matrix M150 300% Irregular Pitch Airsoft AEG Upgrade Spring (500~600 FPS)
[SPR-MTX-PDI-300]
$10.00
by Dave E. Date Added: Sunday 25 November, 2012
This is a very good spring. I got a reading of 580fps!!! before my piston teeth got stripped out. The only down side to my upgrade is i have a SR-25 V2 gearbox long type, which requires a long type piston like the one is the SR-25 and L85. The long type pistons dont come full metal teeth. So be sure to buy an full metal teeth piston with this upgrade. The Matrix full metal teeth piston is the best piston for an extreme upgrade like this

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