matas17 Posted January 22, 2020 Share Posted January 22, 2020 So i have recently got an mp5 from my mate that he doesnt use. And me being me i installed all upgrades i could get: 14 tooth steel tooth piston/ shs piston head SHS double oring air nozzle 21.4mm double oring cylinder head 3/4 cylinder 13:1 shs gears SHS gear delay chip SHS HT motor Gate Titan But i am stuck right now as the gun doesnt feed at all no matter what i tried. I dont know if its an air nozzle or what but i have tried everything. Any advice would be helpful. Link to comment Share on other sites More sharing options...
Armo1000 Posted January 22, 2020 Share Posted January 22, 2020 Moral of the story, don't bother with upgrades 😂 Link to comment Share on other sites More sharing options...
Asomodai Posted January 23, 2020 Share Posted January 23, 2020 13 hours ago, matas17 said: So i have recently got an mp5 from my mate that he doesnt use. And me being me i installed all upgrades i could get: 14 tooth steel tooth piston/ shs piston head SHS double oring air nozzle 21.4mm double oring cylinder head 3/4 cylinder 13:1 shs gears SHS gear delay chip SHS HT motor Gate Titan But i am stuck right now as the gun doesnt feed at all no matter what i tried. I dont know if its an air nozzle or what but i have tried everything. Any advice would be helpful. Why have you gone with an M4 air nozzle? MP5's usually have a 20.3mm and the K version Is even shorter (Some of them anyway). No wonder its not feeding. Link to comment Share on other sites More sharing options...
ak2m4 Posted January 23, 2020 Share Posted January 23, 2020 I've just finished working on a CYMA MP5K. The stock plastic nozzle was 21.6mm and a SHS 21.4 worked fine. What was the stock nozzle length on yours? Link to comment Share on other sites More sharing options...
matas17 Posted January 23, 2020 Author Share Posted January 23, 2020 2 hours ago, ak2m4 said: I've just finished working on a CYMA MP5K. The stock plastic nozzle was 21.6mm and a SHS 21.4 worked fine. What was the stock nozzle length on yours? I bought 21.4mm air nozzle from ak2m4.co.uk and iit had 21.4mm nozzle but still won't fire. It shoots like once in a while. I had bbs roll out of a barrel so I assume nozzle is too short don't think it could be too long. Link to comment Share on other sites More sharing options...
ak2m4 Posted January 23, 2020 Share Posted January 23, 2020 2 minutes ago, matas17 said: I bought 21.4mm air nozzle from ak2m4.co.uk and iit had 21.4mm nozzle but still won't fire. It shoots like once in a while. I had bbs roll out of a barrel so I assume nozzle is too short don't think it could be too long. what was the length of the stock nozzle you were replacing? Link to comment Share on other sites More sharing options...
matas17 Posted January 23, 2020 Author Share Posted January 23, 2020 2 minutes ago, ak2m4 said: what was the length of the stock nozzle you were replacing? 21.4mm Link to comment Share on other sites More sharing options...
ak2m4 Posted January 23, 2020 Share Posted January 23, 2020 4 minutes ago, matas17 said: 21.4mm next thing for you to check is the hop chamber and bucking, make sure it's all fitted correct. put everything back together, remove mag, turn upside down, shine a light down into the feed tube and fire. You should see the nozzle move back and forth into the chamber. failing that let a tech take a look oh also is the double o-ring really tight on the cylinder head shaft? if so make sure it's greased really well, also you can remove one of the o-rings. those double o-ring nozzles aren't for every build, on some builds they can create too much resistence Link to comment Share on other sites More sharing options...
matas17 Posted January 23, 2020 Author Share Posted January 23, 2020 3 minutes ago, ak2m4 said: next thing for you to check is the hop chamber and bucking, make sure it's all fitted correct. put everything back together, remove mag, turn upside down, shine a light down into the feed tube and fire. You should see the nozzle move back and forth into the chamber. failing that let a tech take a look oh also is the double o-ring really tight on the cylinder head shaft? if so make sure it's greased really well, also you can remove one of the o-rings. those double o-ring nozzles aren't for every build, on some builds they can create too much resistence Air seal is 100% and I already checked the hop unit and had it fit well all together, I checked air nozzle last bight and it moves back and forth as gun fires. So atm I'm clueless right now. Link to comment Share on other sites More sharing options...
ak2m4 Posted January 23, 2020 Share Posted January 23, 2020 try removing the delayer try running with 7.4v Link to comment Share on other sites More sharing options...
matas17 Posted January 23, 2020 Author Share Posted January 23, 2020 35 minutes ago, ak2m4 said: try removing the delayer try running with 7.4v Might try different length air nozzles. Link to comment Share on other sites More sharing options...
matas17 Posted January 24, 2020 Author Share Posted January 24, 2020 On 23/01/2020 at 10:54, ak2m4 said: try removing the delayer try running with 7.4v I sorted out the issue but fps keeps jumping from 260-318 on 0.2g bbs but i think thats an issue with hop unit since its cyma because air seal is 100% Link to comment Share on other sites More sharing options...
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