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Discussion Starter · #1 · (Edited)
I have been reading around on the forums for awhile and looking for ways to do the LRB with my TM VSR. Just to give you an idea of what I have for parts.

TM VSR-10 (very old, from when they first came out)
All parts are Stock
Barrel Spacers
Shimmed Hop arm
Flat Hop mod
Eraser for the hop nub
Shooting 294-299FPS (I stretched the spring, Was shooting 200fps)
Matrix .3's. washed (Need to get better BB's)

Spring question:
Does stretching the spring affect accuracy in any way? I read cheesemans post about proper effective velocitys and would like to stay around 295-299 with .3's. Would it be smart to buy a new high end laylax spring? If so which one would give me around 300 with .3's?

LRB question:
How well does the LRB mod work? Is it significant enough to make it worth while? Would it be possible to drill and tap 4 horizontal and perpendicular screw holes through the outer barrel so they secure the inner barrel? That way I could adjust up down side to side fairly easily. The common method I see being used for the LRB mod is with a large barrel shim, which seems like a big pain to custom fabricate in my home shop. Is there any reason this screw method wouldn't work? I'm sure it's been tried before.

I would like to order some of the kits HS5 is selling and everything, but i think it would be better to invest the money into some more needed parts first. For example, The glass on this gun doesn't even work. LOL Left and right windage doesn't do anything.

My money is tight right now. I used to think I was broke when I younger, but its funny how the older you get and the more you work, the less money you seem to have. Strange. So I'm thinking of just getting a nineball bucking, some .3 bioshots, a cheapo matrix scope, and shimming everything properly, possibly a new spring too, depends on what you guys say. With these mods coupled with the LRB, Would I be looking at good groupings at that point? Or would you guys suggest putting my money and time elsewhere?

If you guys think this is all worthwhile, then I will order my parts, and put together a nice write up and some accuracy tests of before and after. But id like to get this done before it gets too cold up here in NY!
 

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Re the LRB, yep, screws will work and provide all the things you are asking of them. It is after all the method I chose to do the LRBs in all of my weapons that I have fitted an LRB to :tup:

Re the spring, I'd get a new one, dependant on the fps your aiming for I'd go with a laylax 150, this will give you around 500 fps, dependant on how good your seals are, this can then be cut down to give you less fps if needed :shot:
 

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Discussion Starter · #3 ·
Sorry for the late response, I've been having internet issues here at my place. But thanks for the reply! I did the LRB mod and it worked great, ESPECIALLY for side to side curves. Only issue I'm having with it, is since the outer barrel is so thin, and the metal used is so soft, the threads I tapped into the barrel don't seem to be holding up so well, even under the least bit of stress. So I'm going to design a collar that has threads in it on the x and y axis, that way the screws will have something more to bite into and i wont have to worry about stripping out the threads on the thin barrel material.
 

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yup, that will work provided the collar is retained within the outer barrel securley.

One of the 1st VSR modded with an LRB I ever saw used a similar method, but in the centre of the barrel, using the hop unit and the barrel cap as fixed points, which is not a true LRB, and to my mind gona cause more issues than it'll cure :shrug: Still the builder said he had good results with it.


I did try this ''centre bend'' method back last year on 1 of my VSRs, for shit'n'giggles, and the results were as I suspected after side by side testing it with my other LRBed VSR no where near as good and very slightly unpredictable :doh:

But if you keep your collar to the fore end of the barrel you should be mint :tup:

Also dont forget that you should also be keeping the barrel at the hop end of the barrel running as straight as possible for the first 2 or 3 inches to give the BB time to stabalize at the topp of the barrel before it hits the curve :yup:
 

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Discussion Starter · #7 · (Edited)
yup, that will work provided the collar is retained within the outer barrel securley.

One of the 1st VSR modded with an LRB I ever saw used a similar method, but in the centre of the barrel, using the hop unit and the barrel cap as fixed points, which is not a true LRB, and to my mind gona cause more issues than it'll cure :shrug: Still the builder said he had good results with it.

I did try this ''centre bend'' method back last year on 1 of my VSRs, for shit'n'giggles, and the results were as I suspected after side by side testing it with my other LRBed VSR no where near as good and very slightly unpredictable :doh:

But if you keep your collar to the fore end of the barrel you should be mint :tup:

Also dont forget that you should also be keeping the barrel at the hop end of the barrel running as straight as possible for the first 2 or 3 inches to give the BB time to stabalize at the topp of the barrel before it hits the curve :yup:
Ahh thank you for the tips! Very helpful. :doh: I had the LRB screws too close to the hop unit. I did about 1/3 towards the muzzle. I will make sure to move the collar toward the muzzle this time. By the way, When you mentioned a "true lrb", I realized my VSR must not be a "true LRB". How is the LRB supposed to be shaped? I thought it was just a downward bend in the barrel, but gathering what you said, I know that is incorrect, and there must be more to it. Surprisingly, I had decent results with mine though. Maybe my idea of decent is different than yours. :lmao:

I think most people glue a nut to the outside of the barrel to solve that problem?
That sounds like it would work, but i'd be worried of resting the barrel on something and bumping one of the nuts and breaking it off the barrel, I guess some JB weld would hold it though. I might do this method considering the collar idea might be too much of a hassle.

The thin metal should be fine - you are not putting nearly any force on the barrel. With an offset of ~3mm, it's not a big deal. I always just tap into the metal of the outer and it turns out fine.
Could be the crappy hardware i was using too. :p It was a bunch of old rusty hardware i had laying around. I shouldn't have even used it, but i was impatient and just wanted to try the LRB out. This VSR rifle is kind of a project gun for me to help me get into airsoft sniping.
 
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