ID: 26258 (SPR-STMA-M100)
Systema M100 Irregular-Pitch Airsoft AEG Power-Up Spring (340~380 FPS) Manufacture:
"Great spring if you want to downgrade for an Indoor CQB setup or if you are converting to a high speed setup.
I've got this in my MP5 (with too many mods to list) and it chrono'd at 330 fps. If you combine this spring with a high speed motor (I've got the G&P M120 HS motor) you can expect a ROF from 20 to 50 bbs/sec depending upon your gearset and other internal components.
Great value upgrade!
"With this spring, a Tight bore barrel and the gasket mod I have seen this spring shooting 380 with .20's in my M16. Before these mods it was only putting out 315, couple that with a 9.6v battery and a high speed motor and you can expect 22 rounds a second
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