Classic M4 Build Off—Leo’s Edition
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1,204 Posts
Lol, Id expect nothing less!
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All right y’all, my externals and base gun came in, so work has begun! So far I’ve fitted the handguard, trigger guard, carrying handle picatinny mount, scope, grip, flash hider, and removed the front sling point.
![Machine gun Air gun Gun barrel Machine Wood]()
![Air gun Machine gun Trigger Gun barrel Gun accessory]()
![Air gun Trigger Gun barrel Gun accessory Gas]()
Here’s the issues so far:
The outer barrel and handguard are wobbly. I may need a new outer barrel, or I may need to just glue/shim it out, but I’m worried it might be because the receiver itself feels pretty wobbly.
Carrying handle is wobbly (no matter how tight it is). Normally I wouldn’t care, but since I kinda want my scope on there to be useful… I’ll be working on it.
I need to modify the lower receiver to accommodate a modern hop unit. This really isn’t a big issue (it’ll take 30 seconds), I just need to be a little careful and make sure I do it right, or I’ll be spending time for sure shimming the HU in the mag well.
Here’s my thoughts on what I’ve got so far:
Y’all… modern manufacturers would learn a crap ton of they went back and looked at Tokyo Mario’s internals. Some parts are outdated, obviously, but this thing is faster on auto than a LOT of modern rifles. Seriously guys. The barrel is also very quite highly polished, and the hop arm fits perfectly no shims required. I’m definitely keeping the stock barrel group together to try it out. I wouldn’t be surprised if it beat out a lot of “modern” and “advanced” barrel groups and stock setups.
The stock barrel window has one tiny burr that could be cleaned up, but aside from that it’s very usable. It also fits a Maple Leaf MR.Hop, so depending on the HU specs I may be adding the stock barrel to my list.
Here’s the issues so far:
The outer barrel and handguard are wobbly. I may need a new outer barrel, or I may need to just glue/shim it out, but I’m worried it might be because the receiver itself feels pretty wobbly.
Carrying handle is wobbly (no matter how tight it is). Normally I wouldn’t care, but since I kinda want my scope on there to be useful… I’ll be working on it.
I need to modify the lower receiver to accommodate a modern hop unit. This really isn’t a big issue (it’ll take 30 seconds), I just need to be a little careful and make sure I do it right, or I’ll be spending time for sure shimming the HU in the mag well.
Here’s my thoughts on what I’ve got so far:
Y’all… modern manufacturers would learn a crap ton of they went back and looked at Tokyo Mario’s internals. Some parts are outdated, obviously, but this thing is faster on auto than a LOT of modern rifles. Seriously guys. The barrel is also very quite highly polished, and the hop arm fits perfectly no shims required. I’m definitely keeping the stock barrel group together to try it out. I wouldn’t be surprised if it beat out a lot of “modern” and “advanced” barrel groups and stock setups.
The stock barrel window has one tiny burr that could be cleaned up, but aside from that it’s very usable. It also fits a Maple Leaf MR.Hop, so depending on the HU specs I may be adding the stock barrel to my list.
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1,038 Posts
Alright, it’s official—Maple Leaf is not TM spec. Fits the barrel fine, but the front “shoulders” are once again too tall for the unit.
Surprising? No.
Annoying? Yes.
Conclusion, China spec and TM spec do not fit Maple Leaf rubbers. This is why I do not recommend these rubbers to everyone, even though the design is quite good.
Spec that do fit: Taiwan. I’ll add more when I find more, but so far G&G units are the only ones that fit properly, and also the only Taiwanese units I’ve gotten my hands on.
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13,060 Posts
And now I Knight you to the Order of those that have Experienced Tokyo Marui....
You may adorn your clothing with this symbol
![T-shirt Font Violet Art Magenta]()
Your wobbly issue is two things.
The outer barrel nut is screwed on to a polymer upper. If you tighten that down you can mitigate some wobble.
Upper is polymer and the walls are thin. It will flex. In the past. People have added material to the wall of the upper with epoxy to give it more "rigidity".
You may adorn your clothing with this symbol
Your wobbly issue is two things.
The outer barrel nut is screwed on to a polymer upper. If you tighten that down you can mitigate some wobble.
Upper is polymer and the walls are thin. It will flex. In the past. People have added material to the wall of the upper with epoxy to give it more "rigidity".
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1,038 Posts
I did mess with the barrel nut, and that helped it for sure, but I wasn’t able to completely remove the wobble. The upper is where I’m more concerned. I’ll look into that epoxy trick…
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1,038 Posts
Alrighty, quick update here: I have my pump, regulator, and line in, all I need is the engine and I’ll be ready to get working.
I’ve been playing with the stock TM barrel… and it’s really good. I put together a few different setups to try it out, and although my setup didn’t like any of my ML or TNT rubbers (I’m using an Arcturus HU), I found that a Modify Baton Ryusoku 70* fit great. Add in a TNT concave nub (wide and flat), and shimming and stabilization of the whole affair, and the setup has printer paper sized groupings at 60 meters… shooting at 1J… in the wind.
There’s a good chance I keep the barrel stock here. My Lambda barrels do have a better finish… but it’s not much.
I’ve been playing with the stock TM barrel… and it’s really good. I put together a few different setups to try it out, and although my setup didn’t like any of my ML or TNT rubbers (I’m using an Arcturus HU), I found that a Modify Baton Ryusoku 70* fit great. Add in a TNT concave nub (wide and flat), and shimming and stabilization of the whole affair, and the setup has printer paper sized groupings at 60 meters… shooting at 1J… in the wind.
There’s a good chance I keep the barrel stock here. My Lambda barrels do have a better finish… but it’s not much.
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1,038 Posts
Alrighty, quick update for y'all. I have my regulator, pump, tank, and line all set up. The only thing I'm still waiting for is the Pulsar itself, which GATE has yet to ship, and may not ship for a little while yet.
In the meantime, I have everything else assembled and ready, and I've been testing a few different barrel groups. So far the stock barrel continues to look promising, but I haven't had the chance to go through all of the packing and nub combos that I'd like to before deciding on a barrel.
I've started looking at fixing the receiver wobble... but it may be simpler to just do a different upper. If anyone has any info on quality TM-compatible uppers I'm open to suggestion. Polymer is preferable, but metal is fine too--it just has to be sturdy and stable.
In the meantime, I have everything else assembled and ready, and I've been testing a few different barrel groups. So far the stock barrel continues to look promising, but I haven't had the chance to go through all of the packing and nub combos that I'd like to before deciding on a barrel.
I've started looking at fixing the receiver wobble... but it may be simpler to just do a different upper. If anyone has any info on quality TM-compatible uppers I'm open to suggestion. Polymer is preferable, but metal is fine too--it just has to be sturdy and stable.
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