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Old 01-10-2019, 04:35 AM   #1
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Wii Tech upgrades for VFC M40A5

Fap or crap? Just received, looks solid but what are the gains?
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Old 01-10-2019, 06:08 AM   #2
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They are extremely high quality, but far from needed at all. Stock parts last forever.
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Old 01-10-2019, 07:17 AM   #3
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Quote:
Originally Posted by Dimitri MdP View Post
They are extremely high quality, but far from needed at all. Stock parts last forever.
Just noticed that after replacing only the bolt set, trigger got really hard to pull. I know it will help me with high pressure-low volume setting (presumably best option to get high FPS with shot to shot consistency) but it also makes it difficult when shooting. I’ll replace the rest of the parts and decide what stays vs what doesn’t.
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Old 01-10-2019, 07:39 AM   #4
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Originally Posted by Jsmithski View Post
Just noticed that after replacing only the bolt set, trigger got really hard to pull. I know it will help me with high pressure-low volume setting (presumably best option to get high FPS with shot to shot consistency) but it also makes it difficult when shooting. Ill replace the rest of the parts and decide what stays vs what doesnt.
The only way I see the bolt kit affecting trigger pull is if it's a little thicker than oem's... so I would definitely recommend installing the other parts first (specially the sear and trigger) and see where to go from there.

Trigger is adjustable in weight and pull, so just play around with those little screws until you hit the sweet spot.

Since you're talking about high pressure, low volume... Are you running HPA or something? I would definitely advice against it. This gun is ridiculously consistent just on propane / map pro after fine tunning the power adjustment wheel and about a hundred rounds of wear-in. I'm talking springer-like consistency. And expanding gases always tend to creep more than HPA, so you won't see any benefit from using HPA and actually limit the max range.

Last edited by Dimitri MdP; 01-10-2019 at 07:48 AM.
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Old 01-10-2019, 02:30 PM   #5
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Not talking about HPA, I’ve bought this rifle for its consistency on GG, just read opinions that it’s always better for consistency if the volume is low and compensated by pressure - that I can achieve with stronger piston spring. I will spend some time on fine tuning of course.

I’ve installed all the parts today, lubed and tuned the trigger to be almost as light as possible - it works, smooth and easy. I’m really impressed by the quality of this rifle. Also, a shout out to WII TECH, their parts are rock solid, great quality and designed better than OEM (I also got Marui 1911 aluminum cylinder set from them - kicks ass like hell!).

I only need to get one or two more mags and I’m good to go.
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Old 04-21-2019, 05:53 PM   #6
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I’ve finally found 2 additional mags and was able to field the rifle once. After installing Wii Tech upgrades the rifle shoots within 500-650fps (regulation range) due to 170% hammer spring and the upgraded hammer itself that is a bit longer than stock. Unfortunately those upgrades made the FPS inconsistent AF. The first shot is 600fps, second 580 and then few following ones 550, then it drops to 520 as last shot. And all that with the adjustment screw almost all the way in. I’ve decided to go back to stock hammer set and will post results once done as my gut feeling is that too much force on the release valve produces too much gas output to be digested by the system.

I was able to hit a torso size target at around 90m (0.49 Novritsch Bbs) which is impressive IMHO but since the FPS inconsistency is too high it is hard to repeat results (and adjust the hop up in the first place).
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Old 04-22-2019, 06:29 AM   #7
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So I went back to the stock hammer set and still was able get 580fps at 0.2g. I also reinstalled the Autobot bucking and did Teflon fix around it. The airtightness seems to be better now as I did a test by blowing into the inner barrel (while closing the gas entry port) and no air seem to leak anywhere. I’m getting around 570-580fps so still some room for improvement but it’s far better than was before. Not sure what else should I do. I’m already using silicon free Puff Dino GG (or mapp pro).
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Old 07-10-2019, 06:44 PM   #8
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Quote:
Originally Posted by Jsmithski View Post
Ive finally found 2 additional mags and was able to field the rifle once. After installing Wii Tech upgrades the rifle shoots within 500-650fps (regulation range) due to 170% hammer spring and the upgraded hammer itself that is a bit longer than stock. Unfortunately those upgrades made the FPS inconsistent AF. The first shot is 600fps, second 580 and then few following ones 550, then it drops to 520 as last shot. And all that with the adjustment screw almost all the way in. Ive decided to go back to stock hammer set and will post results once done as my gut feeling is that too much force on the release valve produces too much gas output to be digested by the system.

I was able to hit a torso size target at around 90m (0.49 Novritsch Bbs) which is impressive IMHO but since the FPS inconsistency is too high it is hard to repeat results (and adjust the hop up in the first place).

Hi there!

Do you think that 3 magazines are enough for a game?

Thanks!
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Old 07-25-2019, 06:52 AM   #9
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Quote:
Originally Posted by dulourencini View Post
Quote:
Originally Posted by Jsmithski View Post
I’ve finally found 2 additional mags and was able to field the rifle once. After installing Wii Tech upgrades the rifle shoots within 500-650fps (regulation range) due to 170% hammer spring and the upgraded hammer itself that is a bit longer than stock. Unfortunately those upgrades made the FPS inconsistent AF. The first shot is 600fps, second 580 and then few following ones 550, then it drops to 520 as last shot. And all that with the adjustment screw almost all the way in. I’ve decided to go back to stock hammer set and will post results once done as my gut feeling is that too much force on the release valve produces too much gas output to be digested by the system.

I was able to hit a torso size target at around 90m (0.49 Novritsch Bbs) which is impressive IMHO but since the FPS inconsistency is too high it is hard to repeat results (and adjust the hop up in the first place).

Hi there!

Do you think that 3 magazines are enough for a game?

Thanks!
Definitely it’s enough for me.
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Old 11-16-2019, 11:12 PM   #10
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Nice to see info from other VFC m40a5 owners.

Dimitri MdP, I followed a few of your replies and got the suggested maple leaf bucking.
I'm in Canada, but can not locate the proper CJ barrel you recommended as everywhere seems to be out of stock.

For a budget option, I was thinking of the ZCl, but if I wanted to go all out, I could get an EdGi for 3-4x the price depending on single or dual bore (thoughts on the dual bore?), length (New to gbb snipers, not familiar with how barrel length ratios work) and whether I wanna pay $25 extra for ported (gimmick?)

I was thinking 6.03 bore, but open to suggestions.

Apologies for the bombardment of questions but you're the best source of information I can find on it: Mine being the ASG m40a5 which seems to be the exact same as the VFC minus the rails :(

Not that I would mount anything, but an A5 should not look like an A3 and I figure it gives just a little more stabilization for the outer barrel.

I owe you my thanks as I never would have went with a GBB sniper if it were not for your posts and I am very pleased with the results, even stock.

EDIT: Jsmithski, could use your advice from a fellow owner as well. I already have the ML bucking, just waiting to get a great barrel.
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Last edited by darknesss; 11-16-2019 at 11:15 PM.
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Old 11-17-2019, 01:42 AM   #11
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Originally Posted by darknesss View Post
(New to gbb snipers, not familiar with how barrel length ratios work) and whether I wanna pay $25 extra for ported (gimmick?)
Gas guns are always overvolumed, so they can take any barrel length without issues. The longer the barrel, the more efficient the system becomes. So go for the original length, iirc 590mm.

On the same page, porting is not that great for most guns, but can make a drastic difference on gas ones, as that helps get rid of the excessive gas, preventing turbulence. That's why I recommend the Crazy Jet in any gas gun, but if you can't find them, a ported barrel will do pretty much the same trick.
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Old 11-20-2019, 02:32 PM   #12
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Hi Dimitri,

Do you know much about this rifle w/respect to gas and winter temps? I am worried about getting it and then realizing I have a difficulty to play with it in sub-freezing temps (We typically get these in colorado :-) ).

Assuming I make the following changes:
Propane in 10-40*C
Propene in 0-10*C
Black gas (wats this?) in -15-0*C

Would the FPS consistency really be serviceable in winter too? (+/- no more than 20fps)
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Old 11-20-2019, 03:16 PM   #13
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You can easily get about +/-5 FPS consistency out of this gun, with +/-2 not being rare if fine tuned.

Winter shouldn't be a problem. Being a NBB, you can easily get away with Propene in -5 to 25C, and propane in 15 to 35C.
Below -5C I'm pretty sure it'll still work on propene, but haven't tested it (it never drops below that here). But if that's not enough, black gas / 4.0 / 4x will certainly do.
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Old 11-20-2019, 05:20 PM   #14
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I’m trying to make mine shooting 600fps and consistently. This seems to be a problem. Above 550fps things start to be unpredictable.
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Old 11-21-2019, 02:02 AM   #15
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Quote:
Originally Posted by Dimitri MdP View Post
You can easily get about +/-5 FPS consistency out of this gun, with +/-2 not being rare if fine tuned.
Any specific tips on fine tuning as mentioned above?
Also, one question I still have after reading what I think is every advice post you have made on this rifle... what is the time gap between each shot you take to achieve the great FPS consistency?
On my M700 running CO2, I can get +/-15fps but I have to wait like a minute between each shot, which really isn’t a realistic time if we are thinking about follow up shots.
For the wolverine bolt, as it is regulated I can take more like 1 second in between each shot and still be consistent.
How is it for the M40?
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