M1A Adjustable Gas Plug

max_freddy

max_freddy

CGN frequent flyer
EE Expired
Rating - 0%
0   0   0
Location
Niagara
Hey guys,

I'm wondering if anyone knows of a adjustable gas plug for a non-Norinco M1A available in Canada. The Schuster M1A Adjustable Plug would be perfect. I could always create my own if I had to, but I would like to buy one.
 
Thanks, but that's not the same thing as a adjustable gas plug. An adjustable plug allows, with minimal adjustment, to affect the pressure that cycles the operating system, allowing for fine tuning to various different loads and weight .308 rounds.

The Schuster seems to be the only adjustable plug on the market... it's just a matter of finding one in Canada. :)
 
"...would like to buy one..." Yet another marketing thing to separate you from your money. There isn't one on any SA Inc. M1A. Isn't needed either. However, if you insist on spending money for no reason, contact Schuster and ask if they have a Canadian distributor.
Add the W's. .schustermfg.com/
 
sunray said:
"...would like to buy one..." Yet another marketing thing to separate you from your money. There isn't one on any SA Inc. M1A. Isn't needed either. However, if you insist on spending money for no reason, contact Schuster and ask if they have a Canadian distributor.
Add the W's. .schustermfg.com/
Click to expand...

They are marketed SO much that they aren't even available in Canada and not many people seem to even know what they are or what they do.
I don't see them marketed anywhere to be honest. Being able to use... a wider variety of loads is stupid, you're right.

Hmm.. You're right again, SA; doesn't use them, so they must serve no purpose.

Damn sunray, I seem to be wasting my life. Can you show me the way? Please? You seem to have it all figured out.

God must have sent you here, to help us poor misguided soul,s away from spending: money on stuff that makes no difference to you.
 
Last edited:
To use heavier than designed bullets (over 174 gr) , there exists a Sadlak NM grooved piston. You'll have to do your own research on this one. BUT I've fed one rifle a great many 180gr loads and a few 200gr that is so equiped and she's still holding strong. USGI or equivalent gas system must be used though.

As for the shuster adjustable... Threads exactly like this have come and gone and no real definitive answer onn availlabilty to canadians nor on their effectiveness. Also requires USGI or equivalent gas system.
I have seen and fired an M1 garand with a shuster adjustable gas system part, but can"t comment much on it's overall effectiveness.
 
Hi Max,

I searched 2-3 years for one without any luck.
As stated by 45acpking, the Sadlak grooved piston is a good way to go. With a little patience you can find it from Fabsport, Treeline or another Sadlak dealer.
With both device you need a tool to switch your setting. It may take a little longer to switch the piston but maybe the result (accuracy) is more constant because if I understand the Schuster has no clicks or position indicator.
 
From all I can tell, these are just modifications to the gas plug, increasing internal volume and a screw to adjust that volume. Some are vented in addition it appears looking at the site, like the fixed version. Gas plugs are cheap and it would be very easy to make one with a larger, and adjustable pocket. If your pocket adjustment screw blows out no worries, nobody's going to be standing in front of the rifle.
 
Ardent said:
From all I can tell, these are just modifications to the gas plug, increasing internal volume and a screw to adjust that volume. Some are vented in addition it appears looking at the site, like the fixed version. Gas plugs are cheap and it would be very easy to make one with a larger, and adjustable pocket. If your pocket adjustment screw blows out no worries, nobody's going to be standing in front of the rifle.
Click to expand...

Tried this LOL , the set screw in the end just backed out. loctite obviously was a no go .
I've got a design for one sitting in my "stuff I should mass produce one day" cabinet... LOL then again, I haven't made one at all yet from those plans.
Got the behemoth Beaver mill at my disposal so maybe I'll play around some with some gas plugs this winter.

I have very slightly bored out a few gas plugs to increase gas volume on a couple krieger barrelled shorties and a norc. Worked well to get the 147's reliably cycling the gas system.
 
wildphil24 said:
Similar to using a Socom16 gas plug?
Click to expand...

Along those lines, yes ;)
I was part of a discussion several years ago with some fellas I know stateside and was pointed to some online stuff about increasing gas system volume. These guys were fine tuning 18" barrelled M1A's so I figured, what the hell, try it on my fussy 18.5".
I wasted a few gas plugs but finally got the happy medium ;)
Piston dwell time and plug volume are two things that may need to be addressed on "some" shorter barrelled rifles, regardless of manufacture. It's not just a norinco glitch
Not sure if the need for this is caused by variances in gas port size between barrels but the odd M305 shorty sure doesn't like the lighter loads
 
Last edited:
Ive been looking at the schusters for a while- Im quite interested and hope someone will bring some in at some point. Apparently you adjust the gas all the way down until it's single shot- then increase gas until the rifle barely cycles. Then you know the op rod isnt getting banged on. Guess they wont fit the stock norinco gas cylinder though.


Very interesting to me as it turns the m14 into a real "elk ready" beast with the 180 gr


http://www.schustermfg.com/
 
I think that the problem is that shuster doesn't have A) an export liscence and or B) the actual part export liscenced.
BOTH have to be done before anyone can export the item. This is why many items at brownells and other US dealers aren't exportable. If manufacturer and part aren't export approved... You can't legally get one out of the U.S.

A sadlak NM grooved in a springfield or USGI gas cylinder is the way to go for bullets over 174 gr. It rapidly decreases gas pressure by venting it off through the groove. No good for lighter bullets 147 and down as for these, more gas pressure is required.

I dunno if our cousins down south have tried it but I could see a volume adjustable gas system coupled with subsonic loads and a silencer being a combo that could do away with the need to shut off gas system when suppressed. Sadly, we don't live in a country where such experimentation is permitted by us regular folk hehehe
 
You must log in or register to reply here.
Back
Top Bottom