M4SD II Suppressor

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Not content with excellence, our design team took the M4SD II through a series of enhancements to bring you a superlative 5.56mm QD sound suppressor. Forged in the fires of Mount Doom, the new M4SD II (Mod 4) begins life as over ten inches of 17-4 stainless, tool steel, bar stock. We have found 17-4 to provide markedly superior wear resistance, as compared to softer high nickle alloys of good reputation in industry. The heart of the M4SD II suppressor is a billet machined "chassis" (tube body), with integrated muzzle device bearing surfaces, which houses the internal components. The "chassis" provides a housing substantially stronger than the strongest tube materials currently available. Through extensive, costly and time intensive machining of the "chassis", a tube structure of superior geometry is derived. The chassis is encompassed by a series of flutes surrounded by supporting structures affording enhanced strength to weight ratio- coupled with a 40% increase of surface area for unparalleled cooling. The M4SD II has surface area comparable to 7.62mm suppressors on the market. Reducing the internal operating temperature of the suppressor yields a superior product with a level of durability beyond that of current market options. Monolithic structure of the blast chamber and tube maximizes safety factor and provides maximum theoretical temperature transfer, allowing heat to normalize, mitigating the effects of erosion to baffle surfaces. Integrated at the request of elite tactical units, the included flash suppressor front cap further reduces flash signature in pursuit of suppressed superiority.

The M4SD II uses our Patented high efficiency baffle technology. Our patented baffling provides high performance coupled with low system backpressure for optimal reliability. The M4SD II offers users a wide range of mounting options using our variety M4SD mounts and compatible A2 compensators.

The M4SD II brings advanced CNC manufacturing, wire EDM, TIG fusion and filler rod welding, together in one full spectrum product.

Unique to Griffin M4SD family suppressors is it's SDQD mounting interface. The mounting system is one of the fastest on the market and accommodates the A2 nato compensator as well as Griffin's proprietary performance rich muzzle device options.

Additionally the M4SD mounting system does not suffer from the wear prone issues of ratcheting systems common to the marketplace.
Our mounting system was designed to provide trouble free use. The mounts of the M4SD family of sound suppressors are precision ground to six ten thousandths of an inch for minimal, repeatable and completely dependable point of impact shift. Built on a mountain of development, the M4SD-II is the pinnacle of performance- the equal of the best competing products available anywhere in the world.

Warrantied on Following barrel lengths: No barrel restrictions! While longer barrels promote longer service life, this suppressor has no length restrictions!



Diameter:  1.5"
Overall Length:  6.6"
Weight:  17.4 ounces
Materials:  High Strength, High Temp, Corrosion Resistant 17-4PH Stainless Steel
Attachment:  Griffin M4SD Mounts and USGI spec A2 compensators*
Finish:  High Temp Cerakote
Attenuation:  35DB

Silencer interface was designed to fit the USGI A2 government contract compliant muzzle devices. We cannot guarantee fitment with an A2 style compensator due to the broad tolerance range of both import and domestic devices from various brands. For guaranteed fitment, we recommend the purchase a Griffin mount.

  • Tig Fusion Welded
  • Flawless Bore Technology
  • Industry leading sound performance
  • Minimal back pressure design
  • Extremely versatile and fast mounting system
  • High strength, high temp, corrosion resistant alloys
  • Full Auto rated on 10.5" barrels and longer
  • Silencer Pouch Included
  • M4SD Shims and over-travel stop Included
  • Compatible with M4SD or A2 Nato Spec Compensators
  • High Temp Cerakote
1.50 (in)
6.00 (in)
1.50 (in)
.22 (5.56mm)
User Serviceable?:
Attachment System:

2 Reviews

  • 5

    Published by Kurt on 19th Jan 2024

    This thing is amazing! I can't believe the versatility of this thing. You could easily dump 3 thousand rounds and still keep going. There's minimal back pressure so way less gas blown into your face. Repeatable p.o.i every single time. The flash and sound reduction of this thing is light years ahead of Surefre's crap. Surefre just came out with their RC3 this year, which is their failed attempt to copy this design, and they failed honorably. Save time and effort and stick with G.A!

  • 5

    Published by Joshua Scharp on 16th Oct 2023

    This was my first suppressor and I absolutely love it! The gate-lok is a very quick and easy system to attach and detach. The M4SDII does a great job of suppressing the 5.56 round. I mainly shoot this on my Sig Virtus and I just can’t say enough good things about this suppressor. I do shoot it on my other rifles but I love the combo with the Virtus. If you are thinking about getting this suppressor, do it! You will not be disappointed! Griffin is a great company and I will be buying an additional suppressors from them in the future!