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Matrix M130 235% Irregular Pitch Airsoft AEG Upgrade Spring (430~520 FPS)
by Dave E. Date Added: November 25, 2012
This will work on all Echo1 AEG, pretty much all the AEG out there other than the PSG-1 (where its a different dimension).

Very good power, gave 450 fps on my G&G M16!

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