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Matrix 120% / M90 Irregular Pitch Airsoft AEG Upgrade Spring (1J / 280~340 FPS)
by Evan L. Date Added: April 10, 2012
Great spring, installed this in my G&G UMG and it shoots exactly as advertised 330-340FPS. Perfect for CQB. Check out my disassembly video and spring change on the UMG here:

Matrix hasn't let me down yet, I will keep purchasing their products.

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