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Old 02-01-2018, 02:01 PM   #1
Young Gun
 
Join Date: Feb 2018
Posts: 5
Well MB02 upgrading

Hi everyone,

I recently was gifted a Well MB02 since I have a love of bolt-action rifles and this is something I can legally shoot in my own house. Anyways, I've taken to tinkering with it and have been browsing around online trying to learn what I can about this and other VSR rifles and what I can do to upgrade it. I ended up installing some Action Army parts:

- zero trigger
- alloy 90 degree piston (had to mill down the teflon guides to fit the smaller cylinder)
- metal spring guide
- M150 spring
- 6.03mm tightbore 300mm barrel


I also added a forward mounted scope for a scout-style set up. The rifle is shooting better than it did stock, but I still am getting some random fliers, which I think is due to the stock hop-up and bucking. I'm planning to next get the Action Army hop-up chamber and perhaps a Maple Leaf 70 degree bucking.

I'm enjoying the tinkering and upgrade process of the gun and I'm starting to look at the receiver and cylinder now. I know the MB02 has a smaller cylinder than the usual VSR rifles, but is that a smaller inner diameter only, or is the outer diameter smaller as well? Reason I ask is because I am looking to get the Action Army one-piece receiver and upgraded cylinder:

https://www.airsoftatlanta.com/colle...sr-10-receiver

https://www.airsoftatlanta.com/colle...0-cylinder-kit

I am relatively sure these two parts ought to play well together since they are of the same company. Just asking the knowledgable collective here for your advice on fit. I also am expecting to need to buy a new 90 degree piston since I had milled down the teflon guide rings to fit the stock MB02 cylinder and it would probably rattle in the upgraded cylinder, yes? Will the stock cylinder work with the one-piece receiver?

Any other upgrades or modifications I should consider? I currently am not playing with any group. Just messing around with the rifle for my own enjoyment. More than anything, it is something I like to do on my down time in my man-cave basement where I have my own 10m range and can shoot my air pistols as well as bows.

Thanks!
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Old 02-05-2018, 11:41 PM   #2
Young Gun
 
Join Date: Feb 2018
Posts: 5
I decided to take a leap and ordered up the Action Army hop-up chamber, Maple Leaf 70 degree bucking, a new AA 90 degree piston, the one-piece receiver, and the cylinder kit. Figured if things didn't fit the MB02, I'd order up a Bar10 and transplant parts over.

Fortunately, the parts all fit just fine. Turns out the MB02 cylinder has the same outer diameter as the AA cylinder at about 24mm. As most are aware, the internal diameter of the MB02 is slightly smaller at about 22mm, while the AA cylinder measures about a half millimeter larger. The wall thicknesses are where there is a discrepancy with the MB02 being the thicker one. I could have used the original cylinder in the AA receiver, but this new one is much nicer. It is coated in some kind of teflon-like material and just feels slicker in the hand. In the AA receiver, the pull is noticeably smoother and easier.

Another area of discrepancy is the bolt handle not fitting the AA cylinder due to it having a smaller inner diameter. I was able to use a rolled up piece of sandpaper to bore out the bolt handle a little so that it fits the cylinder and pivots smoothly. The bolt handle cap fits normally.

So, with the MB02 decked out with a bunch of AA parts, it shoots way better than first out of the box. The AA hop-up chamber and Maple Leaf bucking made a huge difference. With the AA 6.03mm barrel and stock hop-up, it was throwing curveballs here and there and was not really maintaining hop-up settings too well. With the upgrades, this thing is amazingly consistent and I am keeping 1.5"-2" groups at 10m in my basement range. Not sure if that is good or not, but compared to before, the average group sizes have shrunk by half. It probably also helped that I switched to 0.3g BBs and with those, average velocities are around 450FPS.

Doesn't seem like the MB02 is all that popular here judging by the lack of anyone being able (or wanting) to answer my questions. Hope this thread can be of some help to anyone else out there with this rifle looking to upgrade.
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Old 02-06-2018, 08:59 AM   #3
Elfwing   Elfwing is offline
Young Gun
 
Join Date: Dec 2017
Location: Ontario, Canada
Posts: 13
I picked up the mb03 and itís pretty much the same as far as Iím aware. I sent a message to one of the pros here on the forums to confirm a shopping list for a 500fps gun. He suggested I pick up a crazy jet barrel and maple leaf 60* autobot bucking (maybe even 50* cause of cold weather). I also hear whispers about a certain maple leaf hop up arm that I havenít yet looked into.

Regarding that rattle in the cylinder from a small piston, yeah that would definitely exist.

On a 10m range 2Ē groupings are pretty good in my opinion. Maybe try a few shots outdoors. Thereís a dreaded vsr curve with every gun after a hundred feet or so that needs to be tuned out. You could also try hopping up to .32 or .36g bbs. The gun shouldnít have too much trouble (if any) lifting them. Mine could lift a .4 pretty good at 480fps completely stock.

Last edited by Elfwing; 02-07-2018 at 09:33 AM.
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Old 02-07-2018, 03:06 PM   #4
Young Gun
 
Join Date: Feb 2018
Posts: 5
I haven't been outside yet with the upgraded rifle. Been too cold lately. Figured I'd take it out with me when I'm shooting my real rifles at the gun club and see how far this thing can throw the BBs. I'm contemplating ordering a stiffer spring for more velocity, but as it is, the AA M150 spring feels like it offers a good balance between ease of pull and decent speed.

I do get a rare curveball now and then. I'm wondering if that may be due to an air bubble inside the BB or if it is the hop-up having not worked properly. Right now, I'm going down the list on the sticky threads on small mods I can do to improve air seal and overall fit of parts to wring the most out of the rifle.
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Old 02-07-2018, 06:46 PM   #5
Elfwing   Elfwing is offline
Young Gun
 
Join Date: Dec 2017
Location: Ontario, Canada
Posts: 13
If itís an occasional curveball it could be a dirty bb, bucking, or barrel. High quality bbs and regular maintenance should solve it.

I wouldnít be surprised if it shot a good 250 - 300 feet realatively consistent. Most Vsrs will curve off to the left due to a twisting hop arm so a TDC mod will help or aluminum arm (which should be with the upgrade hop chamber).

Maybe try a 60* maple leaf autobot bucking. Reliku has been having lots of luck with his softer one, but bear in mind wear is slightly quicker. Heís also into crazy jet barrels. If youíre a real number cruncher then you could always get into barrel - cylinder ratios and such. Other than that looks like youíve covered everything pretty well. Keep us updated on its performance at the range.
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Old 02-08-2018, 12:27 PM   #6
Young Gun
 
Join Date: Feb 2018
Posts: 5
300ft. is pretty impressive. My gun club has ranges out to 400m. I was thinking I'd just put up paper at varying distances and see how far out I can shoot and have the BB still pierce it.

The other thing I've been considering is getting a longer barrel. The MB02 has a short 300mm barrel and most rifles I see have 430mm barrels. The TM G-spec has the false suppressor that I think some have modified to cover a longer inner barrel. The MB02 didn't come with a suppressor and I think it would be better to have a one-piece barrel anyways. I believe Action Army has an outer barrel that takes a 430mm inner. I think it is tapered, while the stock MB02 barrel is a straight bull, so there may end up a small gap at the stock fore end. Probably nothing some epoxy putty and paint can't fix.

I'm not a number cruncher, nor am I a serious airsoft player. I may try to join a local club this summer, but for now, this is more of me just enjoying the build process. I tend to be a bit of a tinkerer and often try to find ways to improve on things I have.

Last edited by ghost chili; 02-08-2018 at 12:35 PM. Reason: more info
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Old 02-13-2018, 04:03 PM   #7
Elfwing   Elfwing is offline
Young Gun
 
Join Date: Dec 2017
Location: Ontario, Canada
Posts: 13
I would suggest this thread here:

https://www.airsoftsniperforum.com/#/topics/6075

Itís got some number crunching in it but nothing big. The cylinder ratio and barrel curve he talks about in here will be of the most help given youíve covered most everything else. Not sure as to what diy mods youíve done (barrel spacers, air sealing, etc) but if you got the time itís a good read.

By curbing the barrel down ever so slightly he causes the bb to ride the same spot every time, giving him a more consistent shot.

The cylinder ratio is actually cylinder/barrel ratio. Thereís a bunch of math, physics, and numbers behind the whole barrel length thing. This should break it down for you pretty well and help you find the best length for your application, unless you donít mind spending the money and testing a variety of lengths and bores.

My mb03 has a 510mm inner barrel and a slightly smaller cylinder setup then normal vsr guns (as do all Well guns I believe). So because I enjoy the length to my gun and refuse to cut it down, Iíd like to spare cosmetics and just increase cylinder volume to make up for it. When money rolls in Iíll be adding a 510mm crazy jet barrel. But yeah. The going rumour is to do the math on cylinder volume and get the appropriate barrel length-bore combination to avoid a ďvacuumĒ effect.

Good luck, eh!
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Old 02-16-2018, 11:48 PM   #8
Young Gun
 
Join Date: Feb 2018
Posts: 5
Yes, I've been reading that thread and doing some things like Teflon taping the bucking to the hop-up chamber and I added a foam ring to the cylinder head to quiet the shot a little. I've also taken to modifying the AA zero trigger to get a cleaner trigger break with less take-up and over-travel. Took a little bit to study the workings of how the zero trigger worked and then I made up some shims that fit over the pins that provided the travel limits of the trigger. It's not perfectly clean like a tuned single action trigger, but it breaks a lot more crisply with no over-travel and just a tad of take-up like a two stage trigger. Not bad.

I discovered a part that made a huge improvement in smoothing out the bolt pull and eliminating slam-firing from the sear not catching the piston. I bought the Angel Custom M5 trigger guard to replace the stock plastic one:

https://www.evike.com/products/42433/

I had to modify the stock guard to fit the AA zero trigger and possibly didn't do it correctly, causing some binding of the receiver when the screws were all fastened. Anyways, with this new guard, I had to mil down the head of a M5 35mm long button head screw to fit, but it helps draw everything together nice and tight and I found my bolt pull to be noticeably smoother and the sear would engage the piston more securely. Not an expensive mod, but it made my rifle that much more reliable and fun to shoot with a smoother pull. Accuracy seemed a tad better now that the receiver was no longer stressed and everything was sitting in the stock passively.
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Old 03-01-2018, 10:56 AM   #9
Young Gun
 
Join Date: Feb 2018
Posts: 8
Can someone provide a link for a well mb02/mb03 piston which can ship to the US? Preferably a steel one around $30, the stock handle just separated from the crimped cylinder shaft. Before breaking was very difficult to push the cylinder forwards.
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Old 09-25-2018, 02:52 PM   #10
Jura   Jura is offline
Young Gun
 
Join Date: Sep 2018
Posts: 3
I am using this rifle for 2 months, i didnt have any "rifle is not shooting problem" but i would like to increase its shooting distance.
25-30 m is max for streight line of bb.
I saw upgrade on norvitch site for this exact gun that cost 450 $ + 50$ shopping and with shipping beeing 20 $ less then i payed whole replica (and also thats half of my month solary and) so i wanna know what are cheeper options wich give same result.
I know you guys talked alot about this toppic but for someone new at this is just a bunch of words i cant make sense of.
If you could post a few alternative options
Thanks in advance

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Old 10-29-2018, 07:13 AM   #11
Young Gun
 
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Join Date: Oct 2018
Posts: 12
MB02 accuracy upgrade?

I bought a well mb02 vsr10 the other month as a first rifle.

I have been keeping it well cleaned after ever use, but I am still having issues with the grouping accuracy of the rifle. I understand this can be an issue with this being an entry level stock rifle, but as a beginner I am unsure what to upgrade first? the barrel, hop up. Or just modifying the hop up with an s-hop or flat hop?

Any help would be greatly appreciated.
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Old 10-29-2018, 10:37 AM   #12
Jr. Sniper
 
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Location: Northern Europe
Posts: 202
Action army hop up unit. First and foremost. Then bump bb weight to 0.36-0.4g. Then let’s talk about your budget and goals
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Old 09-20-2019, 05:31 AM   #13
Jura   Jura is offline
Young Gun
 
Join Date: Sep 2018
Posts: 3
CNC magazine catch i bought has this little "wings" at the side, and becouse of them I can't screw small screws at side.
Did anybody fix it? If I cut it would it work properly or should I sell it
Btw here is also list of other parts I bought for replica (all items can be found on anareusa, airsoft pro or gunfire)
* marks parts that I ended up not using

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Old 11-07-2019, 12:10 PM   #14
Young Gun
 
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Join Date: Oct 2018
Posts: 12
Well Mb02 upgrade issues

Afternoon all,

After upgrading some bits to my well Mb02, I wanted to try and push the accuracy forward.

I bought a maple leaf monster 75 (degree)
Airsoft pro hop up
madbull 6.03 300mm precision barrel

The Issue is, that i am having worse accuracy that using the stock barrel and hop up that i had modified for a better seal.

Any help would be greatly appreciated, as i feel like ive just thrown £85 into the wind.

First pic it of both internals

Then the numbered targets are as follows

1. new hop up and barrel
2+3. stock hop up and barrel

For the purpose of an indoor accuracy tests I have been shooting 0.2g madbull bb's from just over 9 meters.

I noticed there was a slight tear to the new hop up bucking, but I'm unsure if this is whats throwing it off?

Any help would be very much appreciated.
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Old 11-07-2019, 07:41 PM   #15
Wawan   Wawan is offline
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Looking at your 1st picture, I see the difference between stock cylinder head and the silver one. The nozzle looks smaller than the stock one, I think the silver one is not for VSR series.
You will have a leak between cylinder head nozzle and bucking causing accuracy problem.
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