Forward Controls Design Stoner 63 Style Comp / Flash Hider – Keymo (1/2×28)

Original price was: $105.00.Current price is: $99.75.

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SKU: 6315KM UPC: 682157948611

Product Description

6315KM is the Dead Air sound suppressor Keymo mount of the 6315 (1/2×28) flash hider, compatible with .223 Dead Air sound suppressors with Keymo interface.

  •  Machined in 4140, heat treated and QPQ coated.
  • Length: 2.38″
  • Weight: 3.97oz
  • Drilled for pinning
  • Recommended torque: 25ft lbs +/- 5
  • Proudly designed and made in USA.

FCD are big fans of the A2 flash suppressor/compensator (compensator is the Army TM 9-1005-319-23&P, Air Force TO 11W3-5-5-42, Navy SW370-BU-MMI-010 designation). It is inexpensive and does a decent job of what’s asked of it. FCD went through a phase of expensive and fancy brakes and comps, all of them have worked well but we know they’re not practical for defense/duty ARs. The flash, noise, and concussion they produce are the result and byproduct of reducing the felt recoil (brakes) and keeping the muzzle down (comps).

Threaded for 1/2×28, precision machined from solid 4140 steel bar stock, heat treated and QPQ coated, it is probably the finest A2 style comp/flash suppressor ever produced. Its 3 and 9 o’clock ports are 25% smaller (shorter and narrower) than the other three upward-facing ports so more gas is vented through the upward-facing ports, it is a superior compensator to the A2, its flash suppression is equal to that of an A2. 6315KM is compatible with Dead Air 5.56mm sound suppressors. Note that since 6315KM does have flash suppression capability equal to that of an A2, it is to be treated as a flash suppressor for states that feel threatened by them, such as CA, MA, and NY.

6315KM is a light and short blended performance muzzle device. It provides 15 to 20% better muzzle rise compensation than the A2, and what is impressive is that it does so without sacrificing its flash suppression capabilities, or creating more noise and concussion.

The number 63 in its name pays homage to the Stoner 63 light machine gun, the shape of its ports draws heavily from the Stoner 63 LMG’s flash suppressor design. 6315KM is a part of Forward Controls’ x15 muzzle device series. KM denotes its Keymo Dead Air sound suppressor capability.




Technical Information

Color / Pattern


QPQ Corrosion Resistant



Firearm Compatibility

Catalog Location

California Prop 65 Warning

WARNING: This product can expose you to chemicals, which are known to the State of California to cause Cancer and Reproductive Harm. For more information visit

Customer Reviews

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