The Nosler SR-33ALTi Suppressor is a .338 caliber aluminum and titanium can for magnum and large-caliber rifles (brand part no. 90665). A titanium blast chamber and blast baffle take the heat and erosion at the muzzle, while aluminum outer components keep the weight at 18 ounces. Nosler recommends it for longer barrels and moderate firing schedules, the pattern of long-range precision and big-game hunting. It is HUB compatible and comes with a 5/8×24 direct-thread adapter, so it can ride on a HUB mount or thread straight to the muzzle. For a hunter carrying a magnum rifle into the backcountry, it is a lighter way to suppress a .338.

Key Specifications

• The usable caliber range is .17 through .338, covering cartridges up to .338 Lapua.
• Overall length is 10.5 inches, extra volume for magnum powder charges.
• Weight is 18 ounces, manageable for a can rated to .338.
• Diameter is 1.740 inches, the standard Nosler body width.
• Construction is aluminum and titanium, with titanium where heat is highest.
• Mounting is HUB compatible, with a 5/8×24 direct-thread adapter included.
• Minimum barrel length is 18 inches, per Nosler.

Frequently Asked Questions

What is the shortest barrel I can use it on? Nosler publishes an 18-inch minimum barrel length and recommends the SR-33ALTi for longer barrels and moderate firing schedules.

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.

Is it rated for full-auto fire? No. Nosler lists the SR-33ALTi as not full-auto rated, with a maximum operating temperature of 425 degrees.

Buy the Nosler SR-33ALTi Suppressor, .338 Caliber, Black

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 Nosler‘s silencers and suppressed firearms lineup and our Lubbock, Texas team will handle the transfer, and it ships fast to your Class 3 dealer.