Baff

I have 2-3 plastic hop ups aswell,can try one and see what happens. You meant on very top(on picture #1 spot) or top of the feeding tube(picture #2spot)? As for wearing down mags,i've been using these same mags for 18 months already(last 9 of those months i've been having issue) so if anything they should have been broken in so far i guess 😕

It seems to be a weird midcap syndrome. When mags are almost empty,little to no fps deviation,when they are full,it happens...tried before many different parts and it was always the problem. When nozzle is fully out,by touching it i can see there IS a bit of possible wobble up/down. So i've put SHS cylinder head and the nozzle for it,and when its pulled out theres WAY less wobble and looks like it is alright,i also shortened my tappet plate spring by 2 coils.AAAAAnd again 1 shot is 1.5J but the 2'nd one is at around 0.9 now instead of 0.4 like before. So now its 1.5>0.9>1.5>0.9 etc... untill the mag is almost empty then they are all 1.5. So less wobble > less deviation in J. And i guess that is a typical case of midcap syndrome. Any other ideas how to fix it? Order another cylinder head and matching nozzle for it and hope its alright? Stronger tappet plate spring?

Nothing is silly brother,its damn vodoo. I think the chrono is reliable,shows everyone elses consistent fps...but nonetheless i just loaded my p90,turned on chrono,consistent AF. Switch to cursed m4,same bbs > inconsistency. Potato lyf for me. BRB gonna go change everything from 1 gearbox to another so we can rule that out...again xD Thanks for replies guys ❤️

I have just mounted a different set of barrel,hop,bucking,air seal is terrible but the outcome is similiar. 1 shot 1J next shot 0.4J next shot 1J next shot 0.4J trigger spam like before 10-15 shots,every next shot is 1J So would that be the same problem i guess with aditional other ones and a proof its not a hop,barrel. Also with maxx hop i tried 3d printing some small spacers to put between hop and upper reciever(to push the hop flush to the gearbox) and the problem was the same. Also the maxx hop i have has that extended "ring" with o ring and it fits inside/around the gearbox flush AF.

I tried it before. And because you took your time to suggest it,turned it off right now,same outcome. And also same stuff when i shoot a 15-20 bbs,its alright then. so same with and without Active Braking.

First,hello there! I've been having issues with this gun for 7 months already,been using it but it keeps frustrating me that its not working how it should. It was Specna Arms E19 with its orion gearbox...poop gearbox cracked,replaced it with retroarms cnc gearbox and thats when problems started...one would think ok thats the problem,all the parts are the same from old gearbox and what changed is the shell...but i tried different shell aswell,same problem. Can't find anyone else with same problem. Today got sick of it and decided to make a video and either fix the problem or sell everything and give up on all tech work and just plant potatoes in my garden and live a simple life. Opened up quite a bit of gearboxes v2,v3,v6 in the past 2 years,they all ended up working ever since...but what i cant fix is my own gun 1st shot low fps 2'nd shot good fps next shot-low next shot-good etc... Untill i spam semi/full auto and after that it is alright for awhile(untill i stop shooting for couple of minutes) Curent build on M4 MK18 Specna Arms E19: Jefftron Leviathan with active braking and cycle microswitch,so the cut off lever is out Barrel: 6.02 Stainless Steel 270mm ZCI,same problem on stock barrel aswell Gearbox: Retroarms CNC V2 Gearbox Maxx hopup: tried changing to 2 others >same outcome HOP UP: Maxx adjustable nozzle - tried 3 others m4 nozzle, >same outcome Bucking: Maple leaf macaron 60*(yellow) - tried maple leaf green and madbull red shark > same outome Gears: 18:1 short stroked gears - tried 2 other sets and without short stroke > same outcome Spring: M130 > same problem with weaker ones and non-SS gears Tappet plate: Reinforced Tappet Plate V2 [FPS SOFTAIR] Orange - Tried stock and 2 others Motor: Tornado F1 High Torque Gen.2 Motor,same problem with stock motor Cylinder: stock SA,tried 2 others Piston: SHS blue one with metal teeth Piston head and cylinder head are mushroom type,had same problems with stock aswell -Changed o-rings on everything,compression is excellent(when i hold the nozzle with finger and push piston) -Tappet plate is moving freely inside the gearbox,not getting stuck on something as far as i can see -Different mags dont make difference either -Praying in front of the gun didnt do anything either The main mistery is that it shoots 1 good,1 bad,1good etc...untill i have a feeling something "heats up" and then it shots perfectly every hit...if its some mis-alignment or tappet plate issues it would keep on being broken and not get "fixed" once i get frustrated and shoot a bit xD Open to ANY suggestions,can quickly open up gearbox and take pictures and check whatever needed as long as it makes sense. Posted on couple more forums/threads so will update quickly if there is progress.