Pewpewpetie

Thanks alot for your input. You have an eBay shop don't you? The name rings a bell. Going to order a 14 tooth piston, some new 13:1. (just to be safe). When adjusting aoe is it better to use sorbo pads or washers between piston and piston head?

I think the sector was sitting a little high. Also this screw on the sector was loose and the piston is broken on the inside

I do have grease but cleaned it for the photo. I use a dab of silicone on all plastic to plastic parts and the gun grease on metal on metal. Would you suggest get new piston and short stroke it then?

Thanks for replying, what do I do in this situation?

When I split the gearbox tomorrow evening I'll upload some pics. Really appreciate your help.

I'll have a look when I strip it. Many thanks. If the piston is fine then what do you think the problem could be. Almost as if the piston is slipping on sector gear

So take a tooth off of the pick up side of sector? They are already 13:1 gears. Also in the video you can see when on full auto the piston stops moving for while whilst the gears continue to turn. Is that caused by pme

Almost like the piston isn't being picked up every cycoe in full auto VID_20210503_174950.mp4

Hi all, currently building a faster trigger response/ higher rof m4. I'm using a 7.4vlipo with , double airseal nozzle, sealed cylinder head( compression is very consistent) , 13:1 gears, high speed motor, rewired to deans, madbull python 6.03 barrel, standard green g&g bucking and lonex hop. Gun works a dream in semi, can spam the trigger with no problems at all. Consistently 330/332fps on 0.2g. gun is shimmed lovely, gun cycles very smooth and quiet, problem is that when I fire in full auto it sounds like it's double fedding and screeching(hard to describe) and as soon as I go back to semi it's fine. Chronoed rps and was 32 (if that's needed to help diagnose)

Hi all, currently finishing an ak build up and am having barrel trouble. The ak hop clip doesn't hold barrel tightly and can still be turned. I've tried a madbull barrel with lonex hop and still get alot of movement. Can I do the top dead centre method or is there an easier way.

Hi all currently building a dmr and when I split the specna gearbox I noticed none of the bearings sit flush with the shell. I have tried standard bushings(shs and modify) and all sit to high so can't shim. Is the best option to buy a new shell or drill the bushing hole slightly deeper