SealTeamNorm

@Rogerborg found out the mystery of why the hop does nothing... Opened it up, had no nub unit in it! Omega flat one on order so should be able to hop it down to 345 or so. Agreed joules makes far more sense but both sites I play at have a 350 with 0.2 limit. I would trim the spring but for 3 FPS it feels over kill and I really don't want to open it up again

Another installment. Swapped out the bucking and selector plate for a shs one. Shoots fine now! 20rps around 348fps. The new bucking lips extend slightly over the barrel so I think the issue was the zci gear shaft was a bit bigger than the stock gng one so impacted sealing. Rps feels a little low but maybe missing the odd shot? Plus the hop doesn't impact FPS. Frustrating as every now n then a shot comes out at 350.8 or something. Any ways to reduce this by a few FPS and thoughts on the FPS? Reassembled it anyway ready for games.

Unfortunately only own the one mag but I think it was pretty consistent throughout the mag load. I tried spamming the trigger with no mag attached and all cycled fine no jammin etc so definitely a feeding issue. I'll get hold of a Hi cap and see what happens!

So it's shooting fine now semi. Full auto it's misfeeding then after a few bursts jamming up. Sector delay switch might be needed ? Thought I'd be ok on a 22tpa motor!

Haha yes perhaps it needs more varnish @ak2m4 was definitely the next port of call however trimmed the tappet down... First 2 shots come out weird then it quickly settles to a consistent 340 344fps( shot 80 odd times). Which tbh is bang on. I need to strip it again as full auto won't go on now but it definitely seems to be the tallest timing , going to take one more but off then leave it.

Hi sewdhull, Thanks for the response. I removed teeth only from the pick up side of the sector gear. Interestingly the center axle is thicker on this gear Vs the stock 18 to 1. Timing wise when cycling by hand looks ok? Bbs fall into the chamber and get pushed into the lips before the piston comes forward. I removed material from the bucking lips. When dropping a BB down into the BB barrel hop emulating the mag. The lips stopped the pellet falling into the barrel.

Another update, changed the spring to a m120, removed the lip on the bucking , corrected ape and same issue high FPS variation. 150 FPS to 350 with a m120 Time to trim the tappet plate?

Stripped it all down again both sliding ok Nozzle is the original gng one, not sure how long Gun cycles full auto and on semi fine when not attached the barrel/ feeding pellets. Get loads of air leaking from the nozzle to bucking when shooting with out a mag attached Got a feeling the tappet timing has been thrown off by the short stroke hmm Thanks everyone btw

Also interesting maybe nothing but when I took the motor out the air nozzle jumped forwards a few mm.

Cheers for the responses So I short stroked 2 from the pick up. That shouldn't cause a timing issue but I know it's possible. Should the nozzle make contact with the bucking at rest? If that's the case mine is a good 10mm away. See the picture though it's dark! I'll take the bucking off and see. I think compression should be ok with all new seals etc but never know l. I've tried the tissue test and I'm definitely losing air down the feed tube when firing just not sure how to fix it . @MrTea same bucking and barrel that was working pre tinker! Thanks All

Rebuilt a gun with the following now getting huge FPS variation(80 FPS between shots) 250 to 330 and possibly a little low. G&G warthog Tight bore barrel 13 to 1 zci gears - short stroked 2 22tpa zci high torque M115 asg spring Perun ab++ MOSFET 11.1 v lipo 16awg wire X ring piston seal o ring Double o ring zci cylinder head I've tried turning active brake up and it tightens the spread a little but still present Any thoughts would be appreciated! Thank you all