Siegetek Concepts Precision Airsoft AEG Gear Set (Type: V2/3 / 14.09:1)

"These gears are insane! They work great and I haven’t managed to even scratch them even with manny mistakes on my part just to list a few of my mistakes.
Had the motor to far away and the motors teeth were shredded but these gears were not even scratched! they just had to be cleaned
I had a plastic piston in at the start and the teeth got caught to early it destroyed the piston but no damage to the gears(my mistake I should have put in a stronger spring to get the piston back into place faster)
So what I have to say is the durability of these gears is crazy but you do need to be careful and set up your gearbox right or these gears will shred some parts. in all 10 of 10 on durability and 10 of 10 on ease of use (if you don’t count my stupid mistakes should have done some more research first)

"I have the 14.09:1 gears, sp140, and an ASG 28 TPA motor--instant response but plan to get 10:1 for even more response.

Pros: indestructible if shimmed right, many options of ratio on the market.

Cons: price

"I've had these gears in my JG SL-8 for almost a year now and they ARE the best gears I could get. By far. They do take some trial and error to get them shimmed right and running at optimum speed. I changed out the bushing to Modify 8mm ceramic bearings and have this coupled with a gt-45000 motor from 6mm shop. I get about 38 to 41 RPS depending on the charged of my 11.1 lipo.

I could not ask for a better setup. Warning though..If you use these, make sure you change the piston to a full steel tooth piston and dont skimp on other internal parts.

My sl-8 is now a full SAW and it is terrifying. I HIGHLY recommend any gear from seigetek. I'm pulling an m120 spring with a bore up kit and I get about 328 FPS with 0.25 BBs. Only issue I have had, is I put in a Gate Titan mosfet into a CNCed gearbox. The issue I had is the selector plate kept breaking on me. These are NOT for the faint of heart, but if you want a solid build that can scream, then these are for you.