The Lantac Dragon Dead Air KeyMo Muzzle Brake in .308/7.62 (brand part no. DGN762B-DA) is a recoil control brake with a mount licensed from Dead Air. Lantac USA built it so that the entire Dead Air Sandman KeyMo suppressor range attaches to it without affecting the suppressor’s warranty. It uses Lantac’s Short Energy Pulse system to shorten the length of recoil so repeated shot energy cannot overlap and push the shooter off target. The brake is made for AR-10, .308 style and 300 Blackout rifles and ships with a timing shim set.

Key Specifications

• Caliber is 7.62x51mm / .308, the chambering the brake is designed around.
• Thread pitch is 5/8-24 UNEF right-hand, the muzzle thread this version is cut for.
• The mount is the Dead Air KeyMo interface, which accepts the full Sandman KeyMo suppressor range.
• The mount design is fully licensed from Dead Air, so the suppressor’s warranty remains unaffected.
• The material is AISI4140 steel hardened to 48-52 Rc, built for repeated mounting and dismounting.
• The finish is black nitride QPQ, which adds corrosion resistance.
• Overall length is 2.760 inches, long enough to carry the brake ports and the mount.
• Body diameter is 0.824 inch, and the mount diameter is 1.080 inches.
• The brake weighs 3.42 ounces, light for steel at this size.
• A timing shim set is included to index the mount before a suppressor goes on.

Frequently Asked Questions

Which suppressors mount to this brake? Lantac lists the entire range of Dead Air Sandman KeyMo suppressors, and the mount design is fully licensed from Dead Air.

Does it need to be timed? Yes. It ships with a timing shim set, and Lantac recommends the semi-permanent thread locker Rocksett, sold separately.

What rifles is it designed for? Lantac designs this brake for AR-10, .308 style and 300 Blackout rifles with a 5/8-24 muzzle.

Buy the Lantac Dragon Dead Air KeyMo Muzzle Brake, .308/7.62, 5/8-24

The Dragon brake already handles recoil well on a bare muzzle, and the KeyMo interface adds a clean path to a Sandman suppressor later. This is the .308 version with 5/8-24 threads. See the rest of our AR muzzle devices and order from our Lubbock, Texas gun shop for fast direct shipping.