Strategic Sciences

The Strategic Sciences Multi-Function Muzzle Device (MFMD) is a flash hider, muzzle brake and suppressor in one device that threads directly onto your barrel. The base unit, the MD, is the suppressor. The optional SD and SDX modules lock onto the front for more sound and flash reduction. The MFMD is 3D printed from Inconel 718, was developed under a U.S. military IWTSD program, and completed a Phase II Government Inspection and Performance Verification in February 2026.

We carry the MFMD in 5.56 (1/2x28), 300 BLK (5/8x24) and 7.62 (5/8x24), all rated for full-auto fire. The number in each model name is the over-the-barrel (OTB) length: 0.0 is a flush mount, and the 1.3, 2.4 and 3.0 models extend that many inches back over your barrel to add suppressor volume without adding as much length. MD is the muzzle device only, and MDSD and MDSDX include the SD or SDX module.

In lab testing, bolt velocity stays within ±2% of the unsuppressed rifle on every tested system, so your gas gun keeps its tune, and the MD with the SD module cuts flash by 90% to 99%. On a 20 in. .308, PEW Science gave the 7.62 3.0 with the SDX a Suppression Rating of 62.0 and found it outperformed every silencer it had tested in blast overpressure suppression.

Fitment matters with the MFMD: OTB models need clearance behind the muzzle and a barrel under a set diameter. For model name decoding, fitment steps, lab data by rifle and answers to the questions we hear most, read the Strategic Sciences MFMD buying guide. If this is your first suppressor, start with how to buy a suppressor. Every Strategic Sciences suppressor purchase includes electronic filing, and your suppressor ships from our facility to your home.