Mr. Cantom, Sir: here are a couple of pics of the Globe setup. 
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Globe 555 gas piston pics
- Thread starter kjohn
- Start date
You may need to loosen the fixed gas piston into the cylinder for removal. Pull the cylinder or sleeve back, and back off the square flats on the piston. My 555 needed lots of WD40 and time before it would budge.
It cycled erratically, and the piston and cylinder proved to be pitted/eroded beyond use. A new set from Corwin Arms in SS has proven to be the cure for relible cycling, and not overly violent once adjusted. Wish I had an SVT40 for comparison, as such my opinions are limited. I suspect may who poorly view the rifle have not bothered replacing corroded gas components.
It cycled erratically, and the piston and cylinder proved to be pitted/eroded beyond use. A new set from Corwin Arms in SS has proven to be the cure for relible cycling, and not overly violent once adjusted. Wish I had an SVT40 for comparison, as such my opinions are limited. I suspect may who poorly view the rifle have not bothered replacing corroded gas components.
As I think I recall from my SVT a few years ago, I used an 8mm wrench or was it a 1/4" wrench, one or the other, to loosen off the gas piston by putting it on the flats.
As was said above, they can be seized beyond belief due to corrosive ammo and no cleaning. Some penetrating oil etc will help and as was also said, a new stainless cylinder/piston and adjusting the gas adjuster down will help a lot.
As was said above, they can be seized beyond belief due to corrosive ammo and no cleaning. Some penetrating oil etc will help and as was also said, a new stainless cylinder/piston and adjusting the gas adjuster down will help a lot.
checking on my SVT-M right now
Thank you for that!
That's a really interesting contrast.
Note how far down the barrel the Soviets put the gas port...and then a really long rod. Globeco had the gas port way too close to the chamber...imagine how it slams the action under way too high of a pressure.
And others have posted that the actions tend to get hammered.
That's a really interesting contrast.
Note how far down the barrel the Soviets put the gas port...and then a really long rod. Globeco had the gas port way too close to the chamber...imagine how it slams the action under way too high of a pressure.
And others have posted that the actions tend to get hammered.
Yup, 8mm wrench
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I know, that's a huge difference. They'd need more venting of the gasses.
I'm doing an upgrade to the good old SVT-40 to an 'SVT-M', and lightening the moving gas parts.
Phase two I'd probably do an 'SVT-M Carbine' version, with removed muzzle device, and relocated gas block closer to the receiver.
So...you're going to rethink the Soviets' design? And make it more like the Globeco? Hmmm...
The SVT is violent enough as is. Ever tried to keep a scope mount on one? I tried a few of them. They move.
I had one of those square block like mounts that were around about 8-10 years ago. It had 3 clamp bolts you could tighten down with a ratchet. I tightened it down till they squeaked.
The thing moved forward with every round until the bolt carrier handle started hitting the mount.
I wouldn't change anything to make it recoil more violently. JMHO.
The SVT, like the Garand, was designed to have the gas port a certain distance away from the chamber, close to the muzzle, on a long barrel.
The SVT is violent enough as is. Ever tried to keep a scope mount on one? I tried a few of them. They move.
I had one of those square block like mounts that were around about 8-10 years ago. It had 3 clamp bolts you could tighten down with a ratchet. I tightened it down till they squeaked.
The thing moved forward with every round until the bolt carrier handle started hitting the mount.
I wouldn't change anything to make it recoil more violently. JMHO.
The SVT, like the Garand, was designed to have the gas port a certain distance away from the chamber, close to the muzzle, on a long barrel.
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