The Thunder Beast Arms Magnus SR .30 caliber suppressor (Thunder Beast part no. MAGNUS-SR-30) is the full-length, SR-mount version of the Magnus. Thunder Beast calls the Magnus line the highest-performing hard-use titanium suppressor on the market and the quietest .30 caliber suppressor for most calibers up to .300 Norma Magnum. The SR mount adds a secondary retention lock, which is why this version carries the hard-use, full-auto rating. It is a strong match for big .30 caliber magnums, precision rifles and hunting rigs.

Key Specifications

• The caliber is .30 caliber, and the Magnus is rated for magnum cartridges.
• The mount is the SR (Secondary Retention) mount, which adds a fail-safe lock that holds the suppressor on the brake until you release it by hand.
• The body is 100 percent titanium, which keeps weight down at this size.
• Body diameter is 1.8 inches, with a 1.85-inch rear collar on the SR version.
• Inside is a 360-degree fully welded baffle core, a construction built for durability.
• The suppressor carries a hard-use, full-auto rating when used with the SR mount.
• The finish is high-temp Cerakote in black, a coating made to hold up to suppressor heat.

Frequently Asked Questions

How is the SR version different from the other Magnus mounts? The SR mount adds a secondary locking mechanism, and the SR is the only Magnus version Thunder Beast rates for hard-use and full-auto fire. The SR is also 0.70 inch longer and 2.9 ounces heavier than the CB version.

Do I need ATF approval to buy this? No. As of October 9, 2026, ATF no longer requires Form 4 approval, registration or a tax stamp for suppressors. It transfers on a Form 4473 with a background check through a Class 3 (SOT) dealer. State and local laws still apply.

What kind of shooting is the Magnus built for? Thunder Beast recommends the full-size Magnus for big .30 caliber magnums and hunting, and for precision and long-range shooting.

Buy the Thunder Beast Arms Magnus SR .30 Caliber Suppressor

As of October 9, 2026, this suppressor transfers on a Form 4473 with a background check at your Class 3 (SOT) dealer, with no Form 4 or tax stamp; state and local laws still apply. Order through Thunder Beast Arms’ suppressor lineup and our Lubbock, Texas team will handle the transfer.