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Forward Controls Design 1210KM Keymo Mount - 5/8x24

Muzzle Brake

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Forward Controls Design 1210KM Keymo Mount - 5/8x24


1215KM is their latest offering in the Dead Air sound suppressor mounts line. Threaded for 5/8 x 24, 1210KM is a Keymo compatible brake, compatible with all Dead Air 30 caliber sound suppressors.


Forward Controls doesn't like brakes for ARs, they're loud and obnoxious, and it'stheir opinion an AR has low enough recoil, a brake is wholly unnecessary.  While a brake will reduce felt recoil, it has unjustifiable compromises in increased concussion, noise and flash signature, one also wouldn't want to use a brake from inside a vehicle or indoors, these are trade offs a flash suppressor doesn't have.   That said, a brake for a sound suppressor does have its use as a sacrificial first baffle to increase the longevity of a sound suppressor. 


1210KM is a single chamber brake, with a baffle like chamber forward of the ports.  The tines on top and bottom that connect the Keymo mount to the front chamber are of symmetrical, they think a smaller/thinner top tine to force more gas upward is unnecessary.


Let's do away with ambiguities and insinuations as to what it is and what it does, 1210KM is a brake, it'll be loud, and its concussion will kick up dust visible from the next county if you shoot it from a prone position without a sound suppressor.  1210KM is meant to be used with a Dead Air sound suppressor attached.


1210KM is designed to have less concussion than most brakes.  In terms of felt recoil reduction,  most brakes are similar in performance.  In the old days, some tank guns brakes are nothing more elaborate than a tube mounted perpendicular to the bore forming a T shape, it doesn't take much to make a brake that works.  If one is to look at old tank gun brakes, he will soon realize these tank gun brakes and most muzzle brakes for small arms today bear surprising resemblances and design.  To make a brake less offensive is far more difficult.  In their experience, Knight's Armament's MAM brake is probably the best in that category, it's also very costly.  1210KM follows their design philosophy, it's a simple and effective brake.  It does what it's designed to do, and does so without making unsubstantiated claims.


They tested the 1210KM against a host of brakes and flash suppressors.  Flash suppressors are the least concussive.  The one they know to be the most offensive was as loud, concussive and obnoxious as ever.



  • Machined in 4140 steel, heat treated and black nitrided.
  • 5/8x24
  • Length: 2.402"
  • Weight: 3.81 oz
  • Proudly designed and made in the USA.
More Information
SKU 1210KM
Product Type Muzzle Brake
Manufacturer Forward Controls Design
Thread Pitch 5/8x24
Color Black
Finish Nitride
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