December 4th, 2008, 15:34
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#4
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Join Date: Mar 2007
Location: Kelowna, BC
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Quote:
Originally Posted by m102404
So far as I know, both the Systema "M" and Prometheus "MS" labeling systems stand for Meters/Second.
A M120 spring means 120 m/s = 120*3.3 = 396fps
But note...practically, a lot of rifles with M4 length barrels, and mild upgrade parts will put out 420-440fps....
So a M170 = 561fps theoretical
and a MS210 = 693fps theoretical
both with .20g bbs
have fun...best of luck...(for the one shot you'll get...LOL)
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if this is so, what is the difference between M120 and M120S?
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