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z PDI 150% AEG Upgrade Spring. ( 150 %: ~350 F.P.S.)
[Spring-PDI-150]
$16.00
by Andrew H. Date Added: Saturday 22 November, 2008
EXCELLENT SPRINGS!! PDI makes very consistent springs, and they work well, but BEWARE! These FPS guides are inconsistent in my experience... I have a PDI 170 spring in my M4, and am getting 415 to 420 FPS w/ .25's!

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