re-shimming a VFC gearbox

[CJC]

I have just ordered a VFC hk416 m27 after a lot of research and am wondering if it is worth getting rid of the self shimming gears and re-shimming it normally. Also another topic of mixed opinion, 11.1 or 7.4 in a vfc 416/7? Vfc along with the americans seem to be confident enough to use them (vfc test all guns with a 12v car battery before they box them up), so why are us brits so afraid to use them? I haven't made my mind up yet but gonna run it on the 7.4s which I already have for now

[Sir Stephen]

Re: re-shimming a VFC gearbox

stick to 7.4 and wait until something breaks is my advice. if your buying brand new and you open it up, you have gotten rid of any warranty you may have.

by opening it up to change shims you may introduce a new fault.

[CJC]

Re: re-shimming a VFC gearbox

Hmm a valid point that was my plan anyway tbh as I don't have the money to start messing around with it yet. Just as a side note I don't suppose anyone knows if a magpul ASAP sling plate would fit on it?

[Sir Stephen]

Re: re-shimming a VFC gearbox

they should do, its based of an 'm4', same stock tube etc

[RedHawk]

Re: re-shimming a VFC gearbox

Hmm a valid point that was my plan anyway tbh as I don't have the money to start messing around with it yet. Just as a side note I don't suppose anyone knows if a magpul ASAP sling plate would fit on it?

You won't need to open it up and re-shim it. Unless it's a lemon (very unlikely from VFC but do sometimes happen) it will work superbly.

[bulletman]

Re: re-shimming a VFC gearbox

I've an Umarex (VFC) HK416 I've run it on 7.4 and 11.1 with no problems as for re-shimming it why?? ............the gear are rock soild with the self shimming I've jhad mine over a year and put 10.000 through it, and it still as smooth as when it was new .

[ImmersedWastes]

Wouldn't bother with a reshim untill you have a reason to open the gearbox, then i would dget rod of the self shim and rwpalace with standard shims
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[Caldymoose]

Re: re-shimming a VFC gearbox

VFC gears use a self shimming system. Nice idea in practise and whilst functional, is not the absolute best system in the world. Due to the little springs on the gears, the shafts are slightly different to a normal gear set. Therefore, (I think) if you want to re-shim with traditional shims, you'd need a new gear set. Ask yourself if thats really something you wanna do. If your going to be replacing the gearset, you may as well strip the whole gearbox out and clean it and give it a new coat of nice gear grease/lube. Id look at replacing the piston as well, VFC tend to make their pistons out of a relatively brittle poly carb. Again, they arent bad if your not looking to try and achieve sill ROFs or FPS with them, but they are not as good as some aftermarket ones.