[Tarr]

Hello!

I've noticed several threads with questions about the CYMAs version of the VSR rifle go un-answered so I decided to do a little write up with some basic info on it. Having owned the rifle for a couple of months now and recently installing some upgrades on it, I have some insights to offer you guys.

A quick overview of the rile first:
I'm not going to post pics of the rifle as it arrived because well, its a VSR.. we all know what they look like. I got the black stock version (CM 701B), the overall finish of the rifle was nice, paint on the metal parts is reasonably durable.
The stock has a rubbery feel to it but I don't expect it to last long as some of the coating came off just by pulling off some camo tape I used on it at some point.

The replica comes with three mags so that's a plus, despite them being a tiny bit off spec, more on that later. Stock FPS is around 500 with 0.20g BBs.

Now to what most people are wondering about - is this thing TM and upgrades compatible. Short answer would be YES it is - with very minor issues, as you will see later on.

What i was aiming to install in mine for now would be:
· Action Army Hop chamber
· Action Army Cylinder & Cylinder head
· Action Army Piston
· Silverback teflon/bearing spring guide

First part to go in was the hop up chamber, inner barrel used with it is a PDI with a Maple leaf bucking. If you read these forums I'm sure you will have noticed that the Maple leaf rubber is a tad bit short for the chamber but one wrap of teflon tape and two small o-rings fixed that small issue and resulted in a nice seal.

The fit of the AA chamber in the outer barrel is decent but there is one slight issue that popped up in this area. The CYMA mags seem to be a tiny bit off spec. First problem is the feed »stem« is a little bit too long (front and back face of it) to fit into the chamber. Filing off a tiny amount (less than 1mm combined) on both front and back of the stem fixed that issue (pic of the mods below).
But at this point the mag still will not lock in.

The problem is in the BB retainer not having enough space in the mag to clear the ramp on the hop chamber that moves it out of the way.. easy fix again, less than a 1mm to file off the retainer where it comes into contact with the chamber. After these mods the mag fits nice and snug, locks in properly and feeds with no issue.

Next up was the cylinder which for now i will be using with the stock piston and spring guide as I don't have a 90 degree trigger yet. Not ideal i know but the seal is decent enough still so that's okay while I wait for the new trigger. Point is - the cylinder and its components are indeed TM compatible!

I plan on ordering an S-Trigger next month so i will update the tread then to let you guys know how it fits on the receiver but judging by the stock trigger I'm not expecting trouble in this area, it looks pretty much like a standard VSR one.

The stock i am currently using for this is a Model Works M40A3 stock. As it is made for the standard TM VSR and the CYMA fits in it with no issues it just offers up another piece of evidence towards the CYMA VSR being TM compatible.

Included in the pics are also the stock cylinder assembly side by side with the AA one if anyone is interested in those. The stock cylinder is crimped on the end so that's a bit of a letdown. Stock hop chamber is metal, had a decent seal with the standard right hook issue until i modded the hop arm, it takes aftermarket arms no problem. Barrel was brass, no clue on ID of it but it was nice and straight so it can be a nice barrel with some polishing work put into it.

Stock piston is white plastic, no airbrake, nothing special, spring guide is the same white plastic.

That would be it for now. If you have any questions about this replica feel free to ask, I will do my best to answer.

Edit: typo correcting..

 

[Crusoe]

Dazz at ASPUK also done a take down of one of these on facebook a while ago. in his rifle the piston was actually a 90 degree piston but the trigger was a standard 45 degree sear.

 

[Dorekido]

i think it still 45 piston degree.

https://www.facebook.com/media/set/?set=a.770554796340324.1073741863.176087792453697&type=1

for who want to see more internal.

Just wonder the trigger pull can be adjust, in picture of trigger box, it have that, not sure it can" work" or not.

 

[Crusoe]

looks like 90 to me. The part the sear catches on is the top part.

 

[Tarr]

Yep the trigger has adjustment screws, and it is 45 deg. And i can confirm the piston is 90.

I am aware of the take down on facebook but it didn't really answer my questions if this thing is really 100% compatible with TM. None of the reviews did either or offered conflicting info so i figured some confirmation would be welcome to some.

I may be able to get my hands on some JG mags to test if anyone is interested. Try and compare the two to see what exactly is "off spec" on the CYMA ones.

Overall if someone is picking up a VSR for a project rifle and is planning on upgrading soon then id call this a decent buy. Just keep that cylinder in mind if you intend to use heavy springs.

 

[1tonne]

It does sound like a good gun for someone to start with I would guess that the Jing Gong still beats it as the cylinder in the JG is not a crimped cylinder. It is held by a type of grub screw just like the TM and most aftermarket cylinders are. The JG cylinder can last a very long time with a big spring because of this.
But this is a very useful thread.

 

[Dorekido]

in the album he said:

Initial investigation:

Has a metal Trigger Guard
Uses VSR trigger with 45 degree piston sear
Uses APS2 Type 96 piston with 90 catch!

Therefore cylinder diametre is less than that of the VSR.

Weirdly in stock for the piston has a 90 catch yet the piston sear is 45 degree. Still, it works.

Only downside, the cylinder us aliminium.

 

[Tarr]

in the album he said:

This is what i mean by conflicting information - the cylinder is actually a standard VSR diameter despite the piston.

The trigger guard is metal yes, no idea on cylinder material so i cannot say for sure if it is aluminium or not but it has been established that the cylinder being crimped, will be prone to failure and should be changed out asap anyway if you want to run a heavy spring.

 

[131as22]

It does sound like a good gun for someone to start with I would guess that the Jing Gong still beats it as the cylinder in the JG is not a crimped cylinder. It is held by a type of grub screw just like the TM and most aftermarket cylinders are. The JG cylinder can last a very long time with a big spring because of this.
But this is a very useful thread.

Are you saying there is a grub screw that holds the cylinder head in place as reinforcement or are you saying the cylinder head is threaded on, which is better than being crimped? I've owned too many JG bar 10s and none of them had a grub screw in the cylinder.

IMO a crimped cylinder head (I'm assuming this is just a cylinder head attached by friction) wouldn't be THAT bad. People seem to think the threads in a traditional cylinder are susceptible to wear because it's receiving the piston impact, but since the cylinder head is static and there is (at least there shouldn't be) no space between it and the hop up unit, most of the kinetic energy transfers to the hop up chamber. It's just like how the STS prevents gearbox shells from cracking.

So this can be a huge issue in terms of accuracy because of the vibrations, but as long as you aren't dry firing, have a good seal and have a good dampening system it shouldn't cause damage to the threads. I personally would avoid it completely since it would be a total pain to have to take it on and off during any testing.

But that's just my speculation. I have used a PDI SS5000 spring and welded springs and of all the things that broke, the cylinder head and cylinder threads were not one of them. (thankfully)

 

[Shoushen]

I believe the crimp he is talking about is the crimp that is on the bolt handle end of the cylinder, not the cylinder head end. I've had a cylinder that was crimped break, but since I went with aftermarket cylinder with the pins, I've had no issues & I've run all the big springs while testing in the last few years.

 

[1tonne]

Are you saying there is a grub screw that holds the cylinder head in place as reinforcement or are you saying the cylinder head is threaded on, which is better than being crimped? I've owned too many JG bar 10s and none of them had a grub screw in the cylinder.

I probably worded it badly. I described them as grub screws but they are actually pins in the rear of the cylinder to hold the bolt handle mount in place.
These pins are better than crimping.

 

[131as22]

Okay, well my point still stands regarding the threads.

 

[elrasho]

Hi Tarr,

How do you like the sniper rifle? Did you manage to get the magazine's to lock into place? I'm thinking of getting a JG BAR 10 but came across this CYMA one today.

 

[ronin677]

Thanks for this thread. I have just go the 701b and the mags are a really tight fit. I'll try your mag mod and see if that does the trick.

When you say sand down the areas of the mag, do you mean the outside areas or the lips?

 

[SniperZyzak]

I own the cm701c real shock faux wood stock just upgraded inner barrel hop unit and cylinder head and wanting to know what to do next I can't for life of me make the damn thing quiet any help much appreciated

Sent from my SM-G935F using Tapatalk

 

[Reliku]

Look into a damper pad. Also make sure everything is screwed in securely so nothing can rattle and you could fill up the stock with foam to reduce the sound box effect. Another option is an airbrake but try these things first.

Also, kind of a necro post...

 

[Rowdy10]

Hello!

I've noticed several threads with questions about the CYMAs version of the VSR rifle go un-answered so I decided to do a little write up with some basic info on it. Having owned the rifle for a couple of months now and recently installing some upgrades on it, I have some insights to offer you guys.

A quick overview of the rile first:
I'm not going to post pics of the rifle as it arrived because well, its a VSR.. we all know what they look like. I got the black stock version (CM 701B), the overall finish of the rifle was nice, paint on the metal parts is reasonably durable.
The stock has a rubbery feel to it but I don't expect it to last long as some of the coating came off just by pulling off some camo tape I used on it at some point.

The replica comes with three mags so that's a plus, despite them being a tiny bit off spec, more on that later. Stock FPS is around 500 with 0.20g BBs.

Now to what most people are wondering about - is this thing TM and upgrades compatible. Short answer would be YES it is - with very minor issues, as you will see later on.

What i was aiming to install in mine for now would be:
· Action Army Hop chamber
· Action Army Cylinder & Cylinder head
· Action Army Piston
· Silverback teflon/bearing spring guide

First part to go in was the hop up chamber, inner barrel used with it is a PDI with a Maple leaf bucking. If you read these forums I'm sure you will have noticed that the Maple leaf rubber is a tad bit short for the chamber but one wrap of teflon tape and two small o-rings fixed that small issue and resulted in a nice seal.

The fit of the AA chamber in the outer barrel is decent but there is one slight issue that popped up in this area. The CYMA mags seem to be a tiny bit off spec. First problem is the feed »stem« is a little bit too long (front and back face of it) to fit into the chamber. Filing off a tiny amount (less than 1mm combined) on both front and back of the stem fixed that issue (pic of the mods below).
But at this point the mag still will not lock in.

The problem is in the BB retainer not having enough space in the mag to clear the ramp on the hop chamber that moves it out of the way.. easy fix again, less than a 1mm to file off the retainer where it comes into contact with the chamber. After these mods the mag fits nice and snug, locks in properly and feeds with no issue.

Next up was the cylinder which for now i will be using with the stock piston and spring guide as I don't have a 90 degree trigger yet. Not ideal i know but the seal is decent enough still so that's okay while I wait for the new trigger. Point is - the cylinder and its components are indeed TM compatible!

I plan on ordering an S-Trigger next month so i will update the tread then to let you guys know how it fits on the receiver but judging by the stock trigger I'm not expecting trouble in this area, it looks pretty much like a standard VSR one.

The stock i am currently using for this is a Model Works M40A3 stock. As it is made for the standard TM VSR and the CYMA fits in it with no issues it just offers up another piece of evidence towards the CYMA VSR being TM compatible.

Included in the pics are also the stock cylinder assembly side by side with the AA one if anyone is interested in those. The stock cylinder is crimped on the end so that's a bit of a letdown. Stock hop chamber is metal, had a decent seal with the standard right hook issue until i modded the hop arm, it takes aftermarket arms no problem. Barrel was brass, no clue on ID of it but it was nice and straight so it can be a nice barrel with some polishing work put into it.

Stock piston is white plastic, no airbrake, nothing special, spring guide is the same white plastic.

That would be it for now. If you have any questions about this replica feel free to ask, I will do my best to answer.

Edit: typo correcting..

I have the cyma vsr10 and I’m looking to upgrade the hop up unit but I don’t know how to get the inner barrel out.

 

[cqboi]

If I am looking for an HPA upgrade, should I get one for BAR or VSR? (I have the cyma too)

 

[SiliconeSword]

BAR, the TM/VSR one has different threads.
Most cylinder stuff for VSRs are actually BAR spec, except a real TM VSR itself.