Your basket is empty.

Basket

Help and contact

Free standard delivery over £199

100-day return policy

Brownells UK - World's Largest Supplier of Gun Parts, Gunsmith Tools & Shooting Accessories

United Kingdom

My Account (Sign in)

Shopping list

(0)

Basket

Newsletter

Sale

SCHUSTER
MA ADJUSTABLE GAS SYSTEM

100001733

Description
Ratings (6)

Saves Wear On Bolt Lugs & Softens Blow On Op Rod

Vented steel design changes cycle time by letting you adjust the gas volume in the cylinder. Quick adjustment of vent size with integral set-screw; eliminates changing screws for different vent sizes. Reduces battering on op rod, bolt lugs, receiver and trigger group. Available for M1 Garand and M1A.

SPECS: Steel, parkerized finish. Replaces existing gas nut with no modifications to the rifle. Includes adjustment tool and instructions.

More...

Customer ratings for SCHUSTER M1 ADJUSTABLE GAS SYSTEM

Number of ratings: 6
From brownells.com: 6
Average rating: 4.8

Work great! (24/10/2011)

Using this to adjust the recoil of the op rod, you really can fine tune your M1A with this plug. Works really well, all you have to do is follow the instructions.

Great product! (21/09/2012)

I ordered this for my new Scout Squad. simple install. Took it to the range, it may take several shots to get it set, (normal), from there you're good to go! Worth the money hands down! Great upgrade in my opinion.

Hard to install Adjust Gas Plug, M1A, (24/04/2014)

I bought this product a couple weeks ago to use on my Spfld Arm. inc. M1A and had trouble screwing it in a Military spec. gas cylinder...at first I thought that it was the wrong thread, but a closer comparison revealed that they were correct, just super tight....I used Krills oil on both threads and turning it a 1/8 of a turn at a time using a 1/2" combo wrench it went home....I took the weapon to the range and ran some Tulammo through it. I had to adjust (tune) the valve per instructions and the M1a operated great...it dropped the cases 2 feet away, kinda just barely making it out of the weapon.....no strain on the op rod at all...it is worth the money if you consider how much an M14 op rod cost to replace....

Great device (15/09/2009)

I really like my adjustable gas plug. It softens up the cycling of my garand and lets me shoots commercial ammo safely. The only downside is that I couldn't screw it in with a 1/4 in. drive socket and had to grind a tool out of an old reciprocating saw blade to install it. Overall it is very good.

Makes the M1-A and M-1 Garand New Rifles (02/08/2013)

I have used the Schuster Adjustable Gas System in both the M1-A and the Garand for several years for general shooting and load developement. It is quite simeple to use. Open the gas adjustment screw to the wide open spot by screwing it out until it is within a turn or two of coming out the front end of the gas valve housing. Shoot a round. Obviously, the rifle is not going to go through its semi-auto functions as the valve is venting all the gas. Open bolt, eject the empty case and lock the action open for safe work at the muzzle! Turn the gas valve adjustment screw inward a couple of turns. Fire a shot. The action may start to work, depending upon the gunpowder you are using and bullet weight. Repeat the process turning the adjustment screw in again. Gently, easy does it! Don't turn too far... As you turn the adjustment screw in and then fire a shot,the bolt may start to come back. Repeat the process of screwing the adjustment screw downward. Fire a shot. This time, the bolt may eject the case and close on an empty chamber. Repeat the process. Now turn the adjustment screw fractions of a complete turn downward. Gently now... The bolt may almost lock open! Repeat the process and this time you may be delighted to find the rifle has performed all the semi-auto functions and is locked open, waiting for the next round. NOW, do not change the setting of the adjusment screw. The rifle should lock open again at the next shot. If it does, you are set FOR THIS POWDER CHARGE AND BULLET COMBINATION. If it does not perform all the functions, turn the adjustment screw downward again and lock it in place with the lock nut the is supplied. Make sure you don't get the allen wrench in so far that as you are adjusting the adjustment screw the same time you are trying to set the lock screw on it! Some fine touch is required for this operation! You will use a little more ammo using this system but you will have a rifle that will operate at minumum impact on itself. Do your chronographing at this point. THEN, REMEMBER TO OPEN THE ADJUSTMENT SCREW ALL THE WAY UP TO START OVER WHEN YOU CHANGE LOADS! Maybe you can figure out a way to reset it to the load you just fired. I have not. I just open it up and start again. I love it!

Must Have (18/05/2017)

Must have part for an m1 if you want to shoot it a lot or don't reload and don't have access to surplus. I'm going to tune mine for modern 180 grain hunting loads, since that's the most common ammo I can get. Better to use new ammo too because it's not corrosive or dirty. If you don't have the tool to change the plugs out, a large flathead screwdriver will work. Set screw is a little tricky to get started, but it works well.

Read 6 more ratings on brownells.com

69.9 84.9 2 GBP

Product no.: 100001733
SCHUSTER M1 ADJUSTABLE GAS SYSTEM
Mfr Part: 10021 Vented steel design changes cycle time by letting you adjust the gas volume in the cylinder. Quick adjustment of vent size with integral set-screw; eliminates changing screws for different vent sizes. Reduces battering on op rod, bolt lugs, receiver and trigger group. Available for M1 Garand and M1A.

69.9 GBP 0 £69.90 *

Is a 'Call to order' product.

Backordered, delivery time approx. 4-12 weeks from the USA warehouse.

Specs: Make: Springfield Model: M1 Garand

Add to shopping list

Ask question

Details

Add to shopping list

Ask question

Restrictions

Is a 'Call to order' product.

Top takeaways

The Schuster M1 Adjustable Gas System allows for the adjustment of gas volume in the cylinder to change cycle time.
It features a vented steel design with an integral set-screw for quick vent size changes without the need to swap screws.
Designed for the Springfield M1 Garand, it is made of steel with a parkerized finish and can be installed without rifle modifications.

Attributes

Make: Springfield Model: M1 Garand Delivery weight: 0.023kg

Item details

Made in USA
US export classification: 0A501.x

Product no.: 100002329
SCHUSTER M1A ADJUSTABLE GAS SYSTEM
Mfr Part: 10026 Vented steel design changes cycle time by letting you adjust the gas volume in the cylinder. Quick adjustment of vent size with integral set-screw; eliminates changing screws for different vent sizes. Reduces battering on op rod, bolt lugs, receiver and trigger group. Available for M1 Garand and M1A.

84.9 GBP 0 £84.90 *

Is a 'Call to order' product.

Backordered, delivery time approx. 4-12 weeks from the USA warehouse.

Specs: Make: Springfield Model: M14, M1A

Add to shopping list

Ask question

Details

Add to shopping list

Ask question

🔧 Optimize your M1 Garand's performance with the Schuster Adjustable Gas System. Easy vent adjustment & durable steel design. Get yours now! 🛠️

Description
Ratings (6)

Saves Wear On Bolt Lugs & Softens Blow On Op Rod

SPECS: Steel, parkerized finish. Replaces existing gas nut with no modifications to the rifle. Includes adjustment tool and instructions.

More...

Customer ratings for SCHUSTER M1 ADJUSTABLE GAS SYSTEM

Number of ratings: 6
From brownells.com: 6
Average rating: 4.8

Work great! (24/10/2011)

Using this to adjust the recoil of the op rod, you really can fine tune your M1A with this plug. Works really well, all you have to do is follow the instructions.

Great product! (21/09/2012)

Hard to install Adjust Gas Plug, M1A, (24/04/2014)

Great device (15/09/2009)

Makes the M1-A and M-1 Garand New Rifles (02/08/2013)

Must Have (18/05/2017)

Read 6 more ratings on brownells.com

Forgot your password?
Register

Why order from us?

Unrivaled Product Selection

You want it? We got it!

Expert Customer Advice

Via Phone, Chat & Email

US Goods to your doorstep

No customs, no problems

100 days Returns

Shop with a peace of mind

Offers, Promotions & Exclusive Products

Through our weekly newsletter

Shamelessly Honest

We encourage critical product review

Fair Pricing

We pursue a sustainable pricing policy

We won't leave you stranded

Our entire team is made up of passionate gun enthusiasts

Site Navigation

Product Categories

Ordering

Customer Service

Connect

Secure payment methods

Trade Associations

Welcome!

to Brownells UK, your destination for anything gun related. With our roots in a genuine passion for firearms, we bring you an unmatched selection of Gun Parts, Firearm Accessories, Gunsmithing Tools, Scopes & Red Dot Sights and Expert Knowledge.

Whether you're looking to maintain, repair, or upgrade, we've got what you need!

For Shooters, By Shooters
We share your enthusiasm and know exactly what you're looking for because we're part of the community.

Massive Selection
From the essentials to the unique, find everything under one roof.

Our blend of tradition and innovation
Shop with the convenience of modern technology, backed by a legacy of experience.

Browse our collection and discover why we're the trusted name in shooting sports & hunting.