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Matrix M125 210% Irregular Pitch Airsoft AEG Upgrade Spring (400~470 FPS)
[SPR-MTX-M125]
$10.00
by Jesse S. Date Added: Tuesday 11 December, 2012
I bought the m125 spring and dropped it into my MK43 (stock except for teflon tape on the bucking and modified nub). After 5,000 bbs it was clocked at 2.1 joules - that's 475 FPS with .20s, 425 with .25s.

Careful because this thing does what it says and then some!

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