Supporters Sitting Duck Posted October 27, 2014 Supporters Share Posted October 27, 2014 messing about with a possible M4 type DMR build - aprox 400-425fps say (130 spring or 140 & short stroke it 3 teeth) Generally peeps say bushings for higher fps - but think I saw somewhere about a bushing/bearing/bushing mixture g/box has 8mm holes so unsure to fit all bushing - most likely or use a couple of SHS 8mm I have maybe for spur gear in middle ? (others will be under more stress perhaps though I suppose all will be) Have a 32:1 gear set btw & what I think is about a 20:1-ish if I worked it out right is there something in between say a 24/26:1 that might be better or go with 32:1 any input/ideas - experiences what worked/failed ? cheers in advance for any replies but like to get this running ok with few attempts and if ok would look to do same on an AK mofo sometime if this ver2 g/box is ok Link to comment Share on other sites More sharing options...
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