SACair Forum

Systema makes a regular oil tempered M120 and a stainless steel M120S. Anyone know what the supposed differences are? Is the stainless less-likely to reset over time?

http://www.airsoft-guide.com/default.asp?view=33&ad=1

i don't see how that explains the difference between the stainless steel and the oil tempered.

I've been told by the AEX guys that the stainless ones keep their tension longer & are a little stronger than the oil tempered. I've used both and haven't seen a difference in fps or diminishing tension yet...