Griffin Armament M4SD-K

Availability: In stock

MSRP: $895.00 Our Price: $699.00 Save 21%


Mailed Form 4 approvals are taking approximately 8-12 months, eForm4 approvals have yet to be determined, and Form 3 approvals are taking 5-10 days. 

View the latest ATF Approval Dates

* This item qualifies for Easy Pay Help

Initial down payment of $600.00.
2 payments of $115.91 to be paid over the next 2 months (1 payment due each month) to pay the remaining balance.
Total to be paid = $831.81
* Final total varies depending on tax, shipping, and BATFE transfer fees that may apply to the order.
* 19% service fee applies for the use of Easy Pay.

Quick Overview


The Griffin Armament M4SD-K (Mod 3), made from 17-4 stainless steel, is a billet machined chassis with integrated muzzle device bearing surfaces that house the suppressor internals.  The chassis provides a stronger housing than competing suppressor designs, making the M4SD-K exceptionally durable.  An integrated flash suppressor front cap further reduces any flash signature from the weapon.  Patent Pending baffle technology allows the M4SD-K to out preform suppressors of similar size, and coupled with low back pressure allows reliable functioning of the host weapon.

The SDQD mounting system, unique to Griffin M4SD suppressors, is one of the fastest on the market.  It interfaces with an A2 compensator, as well as the Griffin M4SD series of muzzle devices.  This system allows for minimal, dependable and repeatable point of impact shift when attaching the suppressor.



The Griffin M4SD-K brings a lot of desired aspects of 5.56 suppression to the table.  The ability to mount to A2 style muzzle devices brings in versatility and future-proofs the M4SD-K.  It's reduced size is sought after by many SBR owners, as they reduce barrel length to make a more compact size.  Adding a small suppressors fits these types of builds perfectly.  It's small size, mounting system, and performance makes it worth a look for anyone seeking a compact A2 muzzle device compatible rifle silencer.  



  • 14.5 ounces
  • 5.75” long
  • 1.5" diameter
  • 31dB reduction
  • Full auto rated
  • Works with standard A2 flash hiders



  • M4SD Hammer Comp mount and shims
  • Suppressor pouch
  • User manual



You may also be interested in the following product(s)

Griffin M4SD Muzzle Brake

Griffin M4SD Muzzle Brake

$94.95 Click for price
Griffin M4SD / 30SD Flash Comp

Griffin M4SD / 30SD Flash Comp

$99.95 Click for price
Griffin M4SD Linear Comp

Griffin M4SD Linear Comp

$84.95 Click for price
Caliber .223, 5.56mm
Weight 14.5000
Length 5.75
Diameter 1.5"
Decibel Reduction / Output 27dB Reduction
Full Auto Rated Yes
Mount A2 / Hammer Comp
Thread Pitch What thread pitch do I have? Multiple Thread Pitchs Available
Color No
Finish No
Materials 17-4PH Stainless Steel
Can Be Disassembled No
Manufacturer Griffin Armament
Warranty Lifetime
Model No
Manufacturer's Suggested Retail Price $895.00
Not content with excellence, our design team took the M4SD K 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 K (Mod 3) begins life as approximately nine 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 K 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 K has surface area comparable to compact 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 K uses our Patent Pending high efficiency baffle technology. Our patent pending baffling allows the M4SD K to outperform other competing full size flagship suppressors. This high performance is coupled with low system backpressure for optimal reliability. The M4SD K offers users a wide range of mounting options using our variety M4SD mounts and compatible A2 compensators. 

The M4SD K 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 SDQD mounting system is one of the fastest on the marketand accommodates the A2 nato compensator as well as Griffin's M4SD II series 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 suppressor are precision ground to ten thousandths of an inch for minimal, repeatable and completely dependable point of impact shift. 


Ask a Question

Product specific FAQs have not been added for this product.