The Dead Air Sandman L is a quick-detach .30 caliber suppressor rated up to .300 RUM, the long-body member of Dead Air’s Sandman Series (Dead Air part no. SML762). Dead Air builds the series from the toughest silencer materials it uses, for military and law enforcement users around the world. At 8.9 inches it delivers a true sound reduction of 31 dB with standard 7.62 ammunition by Dead Air’s measurement, one of the quietest 7.62 cans on the market. Cobalt 6 baffles form a solid welded core with a detachable front cap that carries an integrated flash hider. Dead Air calls it the suppressor to beat for a heavy-use tactical bolt rifle or a .308 AR.

Key Specifications

• The caliber rating is up to .300 RUM, covering .308 and the .30 caliber magnums.
• The energy rating is 4200 ft-lbs, Dead Air’s ceiling for the Sandman L.
• Bore diameter is .30 caliber, matched to the cartridges it is rated for.
• Length is 8.9 inches, the long body that buys the extra sound reduction.
• Weight is 21.8 ounces, the cost of a stainless and Cobalt 6 build for hard use.
• Diameter is 1.5 inches, a slim tube for a suppressor this long.
• The core is Cobalt 6 baffles welded with 17-4 PH stainless, inside a stainless steel tube.
• The finish is black Cerakote on the body with nitride attachments, for corrosion protection.
• The QD mount is nitride-finished 17-4 stainless steel, built for one-hand installation and removal.
• Dead Air lists it as full-auto rated with no barrel restrictions, a hard-use rating.

Frequently Asked Questions

How quiet is the Sandman L? Dead Air publishes a true sound reduction of 31 dB firing standard 7.62 ammunition, measured under its own test conditions.

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.

How does the quick-detach mount work? Dead Air describes one-hand installation or removal in seconds, with no wobble, no seizing and minimal point-of-impact shift.

Buy the Dead Air Sandman L QD Suppressor, Rated to .300 RUM

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 Dead Air‘s silencers and suppressed firearms lineup and our Lubbock, Texas team will handle the transfer, and it ships fast to your Class 3 dealer. A long welded-core can is the right answer for a rifle that shoots a lot, because the extra length buys sound reduction without sacrificing durability.