Just bear in mind, for a tec-9 transplant, the most likely scenario would be a M4 spectre gearbox transplant.
I base this on the design layout…the spectre most likely has a proprietry gearbox, being smg pistol size/shaped…very similar to the tec-9.
If it can be done, you would likely need to buy a spectre as well, to canabilise the mag / gearbox. And need to budget for that.
Wont know till they arrive, but thats what im banking on…
It could be quite a expensive exercise…
The problem with one off customs is that they’re very hard to quote any kind of labour costs for.
For example, the UZI… The amount of work that has to go into it is yet still unknown, and the outcome isn’t definite. But the UZI is very much just an exercise in experimentation between a couple of mates for shits’n’gigs to see if it can be done, it’s not really a business transaction.
Love jobs are one thing, if it’s for yourself or a mate then labour doesn’t really come into it. Put it on a business level and it gets tricky…
Bespoke customs can be very exxie, especially if you need to buy two blasters for the project, you might find that with industry labour rates applied your costs blow out disproportionately and you end up paying a whole lot more than the unit’s worth in the end. 
Yup.
My custom pulse rifle cost me an absolute bomb.
Way, way more than the price of the current offerings.
But , first things first.
When I get my tec-9 in , we’ll suss out what can and can’t be done, and if it’s doable.
Then , see what parts are needed.
Then there will be a more accurate picture, of what’s involved…
thanks for taking the time to reply in such great detail, definitely very helpful and informative as always so I very much appreciate it. definitely don’t think it would be overly feasible for me the way you described as I most likely would not want to gut a reasonably priced blaster I’d just imported to get it done. but yeah I definitely asked too early into the project as well.
makes perfect sense the way you described so I’ll just sit back down in the back of the classroom and wait patiently to see what happens, might hit up one of these temu/shien sellers if they can get that grenade hopper tec 9 in their store to send over in the meantime 
thanks guys @BME and @Friendly_Fire
This is incredibly true. An upgrade or optimisation of a blaster is usually very reasonable.
A custom built M4, is generally more than buying an M4 and changing it to suit needs.
Fitting a gearbox into something that isn’t designed for it is a load of work. When I fitted a JG Sig gearbox into an old Wells G36, it was an absolute ballache, weeks of fettling, and getting it working correctly. It absolutely would not have been worth paying someone to do it!
Now, fitting a gearbox into something that wasn’t designed to have a gearbox, I doubt many have the tenacity and dedication required for that. And further, I doubt it is something anyone would want to do more than once, mainly as it would defeat the “Only one in existence” feeling!
@BME @Friendly_Fire your persistence and dedication deserves rewards just for attempting it, and when you pull it off, even more so! Maximum commendations!
100%, agree, was probably a little disrespectful to have asked. was just an honest, curious question as I surely cannot be the only one that’s looking to acquire a tec 9 gel blaster. I mean I’d be happy to just have the one I had as a kid back to display on my rack if nothing more than for it’s sentimental value.
was one of the most memorable gifts my uncle gave me as a child, the most memorable being a big fuck off Bowie knife which my mother refused to allow us to have as she thought we would kill each other with them, and the way my brother’s and I fought as kids, we most likely would have, if only by accidental nonsensical actions leading to fatality… so good thing she didn’t let us get them.
If I could find it, I would have been happy to donate it if it led to the possibility of having a few 3d printed or copy casted tec 9 gel blasters floating around Australia as we simply haven’t had any retailers importing the tec 9’s which is unfortunate as I know I’m not the only person who wants one
So with you having said that @RokSolid I do feel I should apologize to @BME and @Friendly_Fire if I offended or frustrated you guys for my transgression.
My apologies, no disrespect was intended
All good, no need for apologies on my end…
If you dont ask, you dont get…!!
I know whats its like, to have a desire for an item…!!
If you want a tec-9, i would reccommend getting a B709, and grabbing one from the UK.
Its a shell ejector/ laser pointer, but it seems to be pretty good quality replica shell.
Just having one, would half scratch, your itch, and make for a good wall hanger.
That’s why i’m getting a shell ejector Luger P-08…
And, if the TEC-9 can be converted down the track, your already halfway there.
Finally, lets be honest here…
In terms of the UZI / Tec-9 conversion, its @Friendly_Fire whos doing the real heavy lifting…!!!
Currently, my tech skills are fairly basic (something i wanna improve), i just provide the blasters and the ideas…!!
Not disrespectful at all, matey. 
Relax… we don’t get pissed off very often in here… we left all that behind in the previous iteration of this group… oooops! 
so keep the comments and input coming, even though it can be a bit daunting as a newbie jumping in on discussions. We were all there once and it’s a great bunch of supportive loonies in this asylum.
You definitely aren’t the only one after a Tec-9, but honestly it’d be much wiser to wait on @BME 's import exercise and see how you like his review. Cheaper too… it’s much easier to put in a B709 and get one that already chooches than buy two blasters to make one. 
I’m more than happy to help people out with projects if I can and if they’re over their heads a bit but I’ll put it plainly, I ain’t no blaster guru or wizard, I just keep plugging away until I get a result. There are far more knowledgable people in here that do much more amazing work, for sure. 
and I’m the first to ask for their input on projects I’m stumped on.
And I definitely don’t expect to be paid for helping… that’s not my motivation at all.
@shadow187 no disrespect was taken nor implied, and as @BME said, if you don’t ask you don’t get.
I am surprised to be honest, that there is not a gas TEC9 in gel form yet. They are pretty simple. And larger than a pistol so loads of room for the extra size required by gels.
We can keep hoping I guess. All I hope is we just don’t get more M4s and Hicapas, and get some variety.
I haven’t even found an electric one in or available to Australia yet. only found this one that won’t ship to Australia, I would settle for one of these for time time being if they’d send it here, and if it didn’t have to be purchased in bulk
I’m just going to tack this onto this thread, sort of relevant.
Do Double Bell gas mags have a bad reputation for leakage? I seem to remember reading somewhere that they did. 
The DB Taurus that BME kindly donated to the cause has a chronic leak, I was going to buy these replacement valves from Vipertac…
Thing is, if these are OEM valves are they going to be prone to leakage like the originals, or am I better off swapping out o rings on the original valves?
I dont know, what those valves are like.
Ive had o rings replaced, under warranty, and copious oil and maint gas.
I dont know if those are any better, only 1 way to find out…
Get vipertac involved, by buying from them, and fitting them instore, to check before you leave…!!
Those mags have always been an issue, even on new ones…
A shame, because double bell usually make pretty good gear…
30 day warranty, or 30 minute warranty…??
Yeah, good idea getting them to fit… only a five minute job and it’s peace of mind.
Funny, because the Double Bell Glock mags I’ve got are original, 18 months old and are tighter than a mouse’s ear… have never leaked.
All Beretta mags, CO2 and green gas have leaked. Ihobby provided an upgraded valve to stop the leak on CO2 mags(it worked). Didn’t buy a Taurus when complaints about mags emerged. Wonder if they come from the same supplier?
The wetech mags are solid.
My RE berettas , several years old , maint gas and a bit of oil, have never leaked.
I wish they had more spares…
on of my JG works 1911 mags have started leaking, delivered 12 july and the the Kublai p4 1911 leaking mag as well, that was delivered July 31, p4 wasn’t used at all until after upgrading to the metal slide,
no problems with the mags on either one until I used the 12k Dino gas, despite it being recommended by x-force, hopefully just needs the O rings replaced. need to find a decent set of o rings and the tool to undo the top valve, green O rings best or?
I seen a few leaky JG mags. Most of the time it is the screw in the base just needs to be tightened up a little.
ok I’ll give that a try n see how it goes, cheers
yeaap, that’s done the trick for the JG, thank you sir 
unfortunately it’s not doing the trick for the Kublai p4, I think the valve needs replaced
I’ve lubricated the valve but no difference, if I fill the mag and quickly load it into the gun and start shooting it cycles but runs out of gas before gels
any tips on the best/most convenient place to find a replacement valve?
Glad to hear its done the trick for the JG, it is pretty common with JG 1911 and hicapa mags. I know a few of mine had done it. One also leaked out of the box, and was just because the inlet valve wasn’t seated fully. Again, easy fix.
As for the P4, identify if it is the mag or the blaster, easier if you have other mags but not as easy if you only have one.
Fill the mag with gas, then submerge in water is an easy way to see where it is coming from.
If it seems to hold gas but uses it inefficiently, it is more likely the blaster. Often can be solved with a good clean and lube. But also can be loading nozzle springs or hammer leaf springs. Have seen a few blasters with eroded piston heads inside the loading nozzle, but that is rarer. worth checking. Kublai pistols are not as efficient as the JG from my experiences, but Kublais are also pretty thin on the market share compared to JG 1911 and hicapas.
