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CMMG Inc. MK4-S AR-15 Semi Auto Rifle .22 Nosler 18" Medium Weight Barrel 10 Rounds Aluminum KeyMod Handguard Collapsible Stock Black

CMMG, Inc.
We regret that this item is not available at this time.
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Typically ships within 1 to 2 business days when a valid FFL is received
  • All firearm sales are final. NO RETURNS.
  • Return to manufacturer for warranty service.
  • Actual buyer must pickup from FFL dealer who will conduct the background check. Learn more
  • Firearm transfer must be the actual transferee/buyer. Click here to see BATFE form "Transaction Record Part 1".
  • Firearms are only available for purchase online.
A $10 handling fee will be charged per order. No additional charge for multiple firearms on an order.
For over a decade CMMG has remained committed to producing some of the best AR platform rifles in the industry. With a spirit of staunch faith and unwavering dedication they are continually improving their products and processes. It's this firm sense of responsibility that brings you some of the most superb high quality American made rifles on the market today!

The Mk4 S is a premier rifle from CMMG's. This rifle features an 18" 416 Stainless Steel medium taper profile barrel in .22 Nosler. The Mk4S is equipped with an A2 muzzle device and an aluminum RKM14 KeyMod hand guard. This is an awesome AR-15 from CMMG that is great quality and purpose built to be the best AR you own! It has a robust reliable single stage mil-spec trigger and the 6 position collapsible stock will adjust for any shooter or situation. The .22 Nosler caliber is ideal for long range high energy performance in competition or in the field. Whether you like plinking at the range for recreational shooting, you are a professional shooter that needs reliability and accuracy or you're a serious predator hunter, the MK4 S from CMMG is the only rifle you need!

Specifications and Features:
CMMG Inc. MK4 S 23A39E4
AR-15 Style Semi Automatic Rifle
.22 Nosler
10 Rounds
18" Medium Weight Tapered Profile Barrel
416 Stainless Steel with a 1:8" Twist
Threaded 1/2x28 TPI with an A2 Muzzle Device
Forged 7075-T6 Aluminum Receivers
M4 Type Upper Receiver and AR15 Type Lower Receiver
Uses 6.8 SPC AR-15 Magazines
Single Stage Mil-Spec Trigger
CMMG RKM14 KeyMod 6061 T6 Aluminum Hand Guard
6 Position Adjustable Collapsible Stock with Mil-Spec Receiver Extension
A2 Pistol Grip
Overall Length 34.5" Stock C ollapsed
Weight 6.5 Pounds Unloaded
Black Finish
Made In The USA

Buying a Firearm Online is Easy!
  • Add your selected firearm(s) to your shopping cart and check out.
  • Select a local Federal Firearms Licensed (FFL) Dealer that will accept the firearm and complete the transfer. Find a FFL Dealer HERE.
  • If you choose an FFL Dealer that is not on our preferred list, you or your FFL Dealer will be required to fax or email us a signed copy of the Federal Firearms License referencing your Cheaper Than Dirt! order number. Download the Firearm Sales Form
  • Pick up your firearm from the FFL Dealer, who will need to do a criminal and mental health background check. Transfer fees may apply.
Buying Firearms on the Internet

Federal law requires firearms to be shipped to FFL Dealers. For an individual to receive a firearm from Cheaper Than Dirt! it must be shipped to an FFL Dealer in your state.

Locating a Federal-Firearm License Dealer (FFL) in Your Area

There are thousands of FFL Dealers in the United States. You may choose an FFL Dealer from our preferred listing or you may find a dealer in your area. To find a list of FFL Dealers in your area area CLICK HERE. If you choose a dealer that is not on our preferred list, either you or the FFL Dealer will be required to submit a copy of the Federal Firearms License referencing your Cheaper Than Dirt! order number. The FFL Dealer will usually charge a fee to conduct the transfer. There are duties that the FFL Dealer is required to do during the process which include a criminal and mental health background check through NICS. Remember, the FFL Dealer is doing you a favor and the process takes time to complete. Fees can vary so check with the FFL Dealer ahead of time to request a quote on the fees associated with your firearm transfer. The FFL Dealer is in business to make a profit and your internet purchase may be viewed as competition to their retail business. If you feel the fees are too high, you can search for another FFL Dealer.

Completing the Transaction

Once you place the firearm in your cart and checkout you will receive a confirmation email that has your order number and further instructions. We will verify the FFL license and also make the FFL Dealer aware that an order from Cheaper Than Dirt! will soon be arriving for you. Most orders are processed within 2-3 business days from the time we receive and verify the FFL Dealers information. Once shipped, your firearm will arrive at the FFL Dealer within 3-7 days business days. The FFL Dealer will begin processing the shipment. It may be an additional day or so before the FFL Dealer is ready to conduct the transfer of the firearm to you. Call the FFL Dealer and set an appointment to confirm that the firearm is ready to be transferred.

Please note! All Firearm Sales are Final

It is important to thoroughly inspect your firearm before completion of the transfer. Once the firearm is transferred into your name, Cheaper Than Dirt! will not accept a return or exchange under any circumstance. If a defect is discovered after completing the transfer, you must contact the manufacturer directly for repair or replacement.