The Strategic Sciences MFMD 5.56 0.0 SD + SDX Kit is the modular suppressor package for the flush-fit 5.56 MFMD — the SD (Suppressor Device) and SDX (Suppressor Device Extended) that lock onto the 0.0 MD when you want more suppression than the muzzle device alone.

This 0.0 platform is the flush-mounting 5.56 configuration (catalog model MFMD-5.56-0.0). The MD host typically threads 1/2×28 and needs 0.0″ of OTB clearance — it mounts flush at the barrel shoulder when there is no obstruction forward of that point. The SD and SDX modules attach to the front of the MD so you can run a shorter suppressed profile or the longest, quietest setup in the 5.56 family.

Like the rest of the MFMD line, the architecture is baffleless, high-flow, and 3D-printed Inconel. Gas is managed rather than trapped, which helps keep the carbine running clean with minimal backpressure and little change in bolt velocity. On an optimized 5.56 system the family is specified for up to 99% first-round flash reduction, up to 60% recoil reduction, and sub-140 dB sound performance. Swap between SD and SDX as the hunt or range session demands.

This is more than a pair of add-on modules; it is the mission-flexible half of a next-generation muzzle system for the 5.56 hunter or precision shooter who wants less signature and less recoil without adding extra length behind the muzzle.

Product Specifications:

Manufacturer: Strategic Sciences
Model: MFMD 5.56 0.0 SD + SDX Kit
Configuration: SD + SDX (pairs with MFMD 5.56 0.0 MD)
Type: Modular suppressor modules
Caliber: 5.56 NATO / .223 Remington
OTB (MD host): 0.0″ (flush-fit)
Thread Pitch (MD host): 1/2×28
Material: 3D-printed Inconel
Finish: Cerakote (Black or FDE)
Sound: Sub-140 dB (optimized systems)
Flash Reduction: Up to 99% first-round
Recoil Reduction: Up to 60%
NFA: Yes — Class 3 suppressor modules
Included: SD module, SDX module