HomeGunsSAAMI Standardizes Barrel Threads For Suppressor Use

SAAMI Standardizes Barrel Threads For Suppressor Use

Published on

Weekly Newsletter

To be updated with all the latest news, offers and special announcements.

SAAMI, the Sporting Arms and Ammunition Manufacturers’ Institute, has existed since 1913 with standardization of cartridge and chamber dimensions (and cartridge maximum pressures) as its primary focus. With hundreds of ammunition manufacturers and hundreds of barrel manufacturers, it’s critically important that a shared standard exists for everyone to follow. Now, SAAMI has weighed in on a standard for barrel threads. You know, the threads at the muzzle onto which one screws a muzzle device like a brake, compensator, flash hider, or silencer.

As a firearm manufacturer myself (Black Collar Arms) and what you might call a “heavy user” of muzzle devices and suppressors over the last decade+, this was music to my ears. When we began making barrels at Black Collar, we had to decide on all of the specifications of the muzzle threads. There’s way more to it than just calling out 5/8×24 and hitting “go.”

How thick are the threads, what’s the pitch angle of the walls of the threads, how deep are the grooves, how tall are the tips, do the tips come to a sharp point or do you knock them down a little, how much threaded length is necessary from the muzzle to the shoulder, do you undercut in front of the shoulder, etc.? (yes, there are technical terms for each of these things that I’m not using here)

Ultimately it’s a balancing act. Thin threads with deep grooves and short tips will be compatible with the most muzzle devices from the most manufacturers, but the fit will be looser. Larger threads will result in a more precise fit, but may be too tight for accessories from some manufacturers to screw onto the barrel.

We consulted with experts, like the team at Silencer Shop who probably field more silencer and muzzle device compatibility questions than anyone else in the country. We searched for and requested technical drawings (or at least thread specs) from barrel and muzzle device manufacturers. Ultimately, we chose what we felt was as close to the industry norm as possible. What we felt was the best balance of compatibility and precision.

To be completely candid, the end result was pretty much an arbitrary choice. There’s a massive difference between 1/2×28 threads on the loose end of the spectrum vs. 1/2×28 threads on the tight end of the spectrum, but from both ends of the scale and everywhere in-between, it’s all 1/2×28 threads. Choosing some spot somewhere in the middle is . . . well, it’s just a choice. It’s an opinion.

While SAAMI makes it clear in the description that their specifications and drawings aren’t yet approved as the official, final standard, this is a huge step in the right direction for everyone making barrels and every sort of muzzle device.

I’d highly encourage all manufacturers to review these technical drawings and consider cutting their threads to these specs.

Good on SAAMI for recognizing the importance of setting and maintaining a standardization system for this critical component of a firearm, and for taking a major step toward setting that standard.

 

Read the full article here

Latest articles

Only $300! Bull Pump Shotgun from SDS Imports — NRA 2024

12 Guage Bullpup Feature Articles Industry News NRA 2024 SDS Imports...

Anti-Violence Project Based on Misinformation

Gun rights and safety aren't incompatible, no matter what people say. What is a problem,...

Custom Colt Pythons From Empire! — NRA 2024

.357 Magnum Accessories Colt Python Feature Articles Industry News NRA 2024...

Would You Buy a Wood Stock SIG Cross? — NRA 2024

Cross Rifle Feature Articles Industry News NRA 2024 SIG Sauer ...

More like this

Walther PPK in .32 ACP! — NRA 2024

.32 ACP Feature Articles Industry News NRA 2024 Pistol PPK/S Walther...

Just In Time for Memorial Day Cookouts: ATF Director Grilled at Congressional Hearing

ATF agents cut off the electricity to Bryan Malinowski’s Little Rock home before executing...

Adaptive Target System Shotrocker: Easy Setup Reactive Target

One might think the business of setting up a target is an easy one;...

Gun Rights and Safety Aren’t Incompatible Concepts

The right to keep and bear arms is preserved by the Second Amendment. It...

Summer Precaution: Outdoor Target Shooters Should Take Care Not to Start Wildfires

Here’s something many of us who shoot outside don’t think about too often, but...