Rugged Suppressors Alaskan 360. Rated for pistols and subguns up to 9mm, rifles up to .338 Lapua. Uses Rugged Universal Mount (R.U.M.) for compatibility with all Rugged rifle mounts and industry-standard mounts. R.U.M. is Grade 5 titanium — 11.8oz total with mount. Lifetime warranty. Note: If this product is reflected as in-stock it means it's either physically in-stock or allocated and available (serial number is assigned) at my distributor