Quote:
Originally Posted by jaydempster
Just incase anyones interested, I own several sets of shs gears, 13.1,18.1 and 100:300. All sets work great and with a proper shim job are very quite indeed. The 13:1 gears are silent but not much good for anything over a m100. The 18:1 are great, i've put about 10k rounds through with a PDI 150% and the are still perfect...
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18:1 is considered normal ratio gears iirc. And PDI 150% springs shoot at 390fps tops in most tuned rifles, but drops to 350ish in short barrel AEGs. In short, its not as stiff as the 150 suggests. SHS 13:1 ratio gears are good for an M120 in a setup where ROF isn't insane, I wouldn't trust them to hold for very long on a 20+ RPS setup.