Anyone sell unitized gas cylinders + adjustable gas plugs here?
- Thread starter GunNewb
- Start date
Most of the Norinco gas assemblies are out of spec and look crappy compared to GI or aftermarket. Brownells sells SAI NM unitized gas cylinders which have the front band blind welded to it. The SAI’s hidden weld looks much more professional than the exterior tig welded cylinders I’ve seen out there lately.
Sorry to beat a dead horse, but I just want to be clear on this:
1) an SEI or Springfield Armory gas cylinder (not talking about the gas lock) WILL fit the Chinese barrel, but you will need an American spec gas cylinder plug.
2) the Chinese piston may work, but the rule of thumb is to use an American spec piston
3) the spindle valve can be carried over from the Chinese gas cylinder to the American one.
Did I get that straight??
1) an SEI or Springfield Armory gas cylinder (not talking about the gas lock) WILL fit the Chinese barrel, but you will need an American spec gas cylinder plug.
2) the Chinese piston may work, but the rule of thumb is to use an American spec piston
3) the spindle valve can be carried over from the Chinese gas cylinder to the American one.
Did I get that straight??
I think the best advice is to use the piston meant for the cylinder you are using. There are wildly varying dimensional discrepancies between chinese gas system parts an their US counter parts.
So, the "rule" of thumb, to avoid any issues altogether, use a chinese piston in a chinese cylinder and a GI type piston in a U.S. spec cylinder.
Ya ya, there"s always gonna be the guy that says he"s mixed and matched with success.... But why screw around and take the gamble.
Yes, ALL availlable gas cylinders will fit the chinese barrel and of course you will need to match the correct plug. Chinese is metric thread... US counterpart is not.
You can use a US spindle valve set BUT it generally needs a few thou polished away to fit and function correctly in a chinese cylinder.
I think ALL this info is in the stickies that nobody reads LOL
As for NM unitizing, the "hidden weld" method is not difficult, but takes time to do right. Templating and milling out the gas band plate and the subsequent detailing needed afterwards, makes this method too costly to be an attractive modification. It's about 1.5 hours of prep, 1/2 hour to weld, 2 hours to slow cool, and an hour or more to detail to perfection. So an easy 4 to 5 hour job to "do it right" will run you about 350.00 at most gunsmith's benches LOL
SAI buys the parts and has it all done in a production manner and can easily swallow the cost and still offer the NM cylinder at a fairly reasonable price.
The US military's approved method of the exterior TIG welds at 10, 2 and 6 o'clock do the job very well and is an affordable effective accurizng modification.
Those 3 little 1/8" tig welds may not be "pretty" to some guys.... But it's a battle rifle, not a prom date
So, the "rule" of thumb, to avoid any issues altogether, use a chinese piston in a chinese cylinder and a GI type piston in a U.S. spec cylinder.
Ya ya, there"s always gonna be the guy that says he"s mixed and matched with success.... But why screw around and take the gamble.
Yes, ALL availlable gas cylinders will fit the chinese barrel and of course you will need to match the correct plug. Chinese is metric thread... US counterpart is not.
You can use a US spindle valve set BUT it generally needs a few thou polished away to fit and function correctly in a chinese cylinder.
I think ALL this info is in the stickies that nobody reads LOL
As for NM unitizing, the "hidden weld" method is not difficult, but takes time to do right. Templating and milling out the gas band plate and the subsequent detailing needed afterwards, makes this method too costly to be an attractive modification. It's about 1.5 hours of prep, 1/2 hour to weld, 2 hours to slow cool, and an hour or more to detail to perfection. So an easy 4 to 5 hour job to "do it right" will run you about 350.00 at most gunsmith's benches LOL
SAI buys the parts and has it all done in a production manner and can easily swallow the cost and still offer the NM cylinder at a fairly reasonable price.
The US military's approved method of the exterior TIG welds at 10, 2 and 6 o'clock do the job very well and is an affordable effective accurizng modification.
Those 3 little 1/8" tig welds may not be "pretty" to some guys.... But it's a battle rifle, not a prom date
thanks for the info, Thomas.
I did read through those stickies, but there is just so much info there, it's hard to keep track of. Old brain leaks like a sieve now.
I just wanted clarification on this thread because I think some guys started mixing up the terms gas "cylinder", "plug" and "lock" by mistake and confused me.
I did read through those stickies, but there is just so much info there, it's hard to keep track of. Old brain leaks like a sieve now.
I just wanted clarification on this thread because I think some guys started mixing up the terms gas "cylinder", "plug" and "lock" by mistake and confused me.
