snuff Posted January 4, 2020 Share Posted January 4, 2020 Playing today with my specna arms SA-V carbine it decided to lock up the gearbox.It made a funny noise as in naffed gearbox then locked the piston. I've had a cursory look but nothing detailed yet..why would it do this?7.4v Lipo unmolested standard gun.Thanks for any advice. Link to comment Share on other sites More sharing options...
EDcase Posted January 4, 2020 Share Posted January 4, 2020 Sorry to hear Snuff 🙁 Only way to know is crack it open... Link to comment Share on other sites More sharing options...
Mostly Retired Moderators L3wisD Posted January 4, 2020 Mostly Retired Moderators Share Posted January 4, 2020 How old is it @snuff? Link to comment Share on other sites More sharing options...
snuff Posted January 4, 2020 Author Share Posted January 4, 2020 2 years old I guess but not used by the previous owner.I was advised it is the "cheap" gearbox by a fellow owner.I will split it but wondered if it was common....never happened with my ICS guns....Cheers. This--->https://www.patrolbase.co.uk/specna-arms-sa-v-carbine?pv=8204 Link to comment Share on other sites More sharing options...
snuff Posted January 4, 2020 Author Share Posted January 4, 2020 That'll do it....any advice on 350 fps spring for this,thanks. Link to comment Share on other sites More sharing options...
Iceni Posted January 4, 2020 Share Posted January 4, 2020 @ak2m4 He's the man to ask. He should know exactly the spring for the job. For a safe bet something like the ZCI M100 usually comes in slightly under the limit, but it'll depend on the barrel and airseal as well.https://www.ak2m4.co.uk/internal-parts/springs/zci-aeg-spring-m100 Link to comment Share on other sites More sharing options...
Supporters Adolf Hamster Posted January 4, 2020 Supporters Share Posted January 4, 2020 Ooh nasty, does it have a thrust bearing on the spring guide? If not might wanna invest in one. I tend to avoid having one on the piston these days, rather keep it as light as can be without swiss cheesing the strength out of it. Link to comment Share on other sites More sharing options...
snuff Posted January 4, 2020 Author Share Posted January 4, 2020 9 minutes ago, Adolf Hamster said: Ooh nasty, does it have a thrust bearing on the spring guide? If not might wanna invest in one. I tend to avoid having one on the piston these days, rather keep it as light as can be without swiss cheesing the strength out of it. No thrust bearing,I'll order one when I get a spring. Link to comment Share on other sites More sharing options...
ak2m4 Posted January 5, 2020 Share Posted January 5, 2020 Those first gen Specna's are just rebranded E&C, the QD spring guide "should" have a bearing on it, same as the one below... It's very rare to get spring damage like that but it does happen. "cheap" gearbox or not, happens to expensive AEG's as well Link to comment Share on other sites More sharing options...
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