CMMG Dissent MK4 Semi-Automatic Pistol .300 AAC Blackout 6.5" Barrel (1)-30Rd Magazine Black Polymer Finish
The CMMG DISSENT is an AR Personal Defense Weapon like no other. Incorporating a variety of new features and technologies, each DISSENT is made to maximize portability and modularity, most notably thanks to CMMG’s patent-pending Compact Action that houses the entire recoil system in the upper receiver, eliminating the need for the buffer tube altogether.
Chambered in 300 BLK, this DISSENT packs .30 cal power in an ultra-compact package that offers AR15 ambi controls and our forward non-reciprocating side charger that can be switched for left or right-handed operation. At the rear of the lower receiver is a 1913 picatinny rail section for attaching the brace or stock that fits you best.
Each DISSENT is available in a variety of custom Cerakote finishes to match your style.
SLR Adjustable Gas Block
300 BLK is an incredibly adaptable cartridge with different loadings for specific uses, like suppressed. With the SLR adjustable gas block on each 300 BLK DISSENT you can fine tune the gas system to best suit the supersonic or subsonic ammo loadings you like best.
TriggerTech AR-D 2-Stage Trigger
TriggerTech’s AR-D trigger was developed in collaboration with CMMG to be fully optimized for use with DISSENT firearms and upper receiver groups. With a 4 lb pull weight, the AR-D trigger showcases a light, repeatable break. CMMG does not guarantee optimal DISSENT functionality with Mil-spec or other aftermarket triggers.
Platform: Mk4
Caliber: .300 BLK
Operating System: Compact Action-Direct Impingement
Barrel Length: 6.5
Barrel Twist: 1:7
Barrel Contour: MT
Barrel Material: 4140CM, SBN
Barrel Twist: 1:7
Muzzle Device: CMMG ZEROED Linear Compensator
Muzzle Thread: 5/8 x 24
Gas Port Location: Pistol
Gas Block: SLR Adjustable .750"
Upper Receiver: DISSENT 7075 T6 Aluminum
Lower Receiver: Mk4 Forged 7075 T6 Aluminum
Hand Guard: CMMG 5.5" Proprietary
Finish: Cerakote
Charging Handle: DISSENT Side Charger Left
Pistol Grip: CMMG ZEROED Pistol Grip
Receiver Extension: 1913 Picatinny Rail End Cap
Trigger Type: TriggerTech AR-D 2-Stage
Trigger Guard: CMMG ZEROED Trigger Guard
Safety Selector: CMMG ZEROED 60/90 Degree
Magazine: Magpul 300BLK 30rd PMAG
Weight: 4.8 lbs
Length: 14.7"
Specifications
Gun Brand: CMMG, Inc
Gun Model:
Gun Capacity: 30
Gun Caliber: 300 AAC Blackout
Gun Barrel Length: 6
Gun Finish: Black
Gun Stock / Grip Finish: Polymer
Gun Condition: New
Type Of Gun: Pistol
Gun Function: semi auto
Gun Brand: CMMG, Inc
Gun Model:
Gun Capacity: 30
Gun Caliber: 300 AAC Blackout
Gun Barrel Length: 6
Gun Finish: Black
Gun Stock / Grip Finish: Polymer
Gun Condition: New
Type Of Gun: Pistol
Gun Function: semi auto
Before You Purchase A Gun
What Do I Need To Buy A Gun?
Answer teThe requirements to buy a gun depend on your location, but in the U.S., here are the general steps:
- Age Requirement
- Background Check
- Valid Identification
- Residency Requirement
- Firearm License or Permit (If Required)
- Waiting Period (If Applicable)
- State-Specific Laws
Is it legal to buy a gun online?
Yes, buying a gun online is completely legal in the U.S., but the firearm must be shipped to a Federal Firearms License (FFL) dealer in your state. You’ll need to pass a background check and complete any required paperwork before taking possession of the firearm.
Do I need a background check to buy a gun online?
Yes. Even when purchasing online, a background check is required at the FFL dealer where you pick up your firearm (unless you have a permit that exempts you in your state). The FFL dealer will conduct the check before handing over the gun.
Can I have a gun shipped directly to my house?
No, firearms cannot be shipped directly to your home. They must be sent to a licensed FFL dealer, where you will complete the legal transfer process. However, ammo and accessories can be shipped directly to your residence in most states.
How do I choose an FFL dealer for my transfer?
Many online gun stores allow you to select an FFL dealer during checkout. If not, you’ll need to find a local gun shop or licensed dealer willing to handle the transfer and provide their information to the seller.
After You Purchase A Gun
What happens after I purchase a gun online?
After completing your purchase, your firearm will be shipped to a Federal Firearms License (FFL) dealer near you. You’ll receive tracking information and instructions on how to pick up your firearm.
What do I need to do after purchasing a gun online?
After purchasing, provide the seller with the information of your chosen FFL dealer (they will handle the transfer). Once the firearm arrives at the dealer, you’ll go there, complete the required background check and paperwork, and then take your firearm home after approval.
What do I need to bring when picking up my gun?
When you arrive at the FFL dealer, bring:
- A valid government-issued ID (matching the address on your order).
- Any required permits or licenses (varies by state).
- Payment for the FFL transfer fee (usually $25-$75, depending on the dealer).
Do I have to pass a background check when picking up my gun?
Yes. Even if you bought the gun online, you must pass a background check (NICS) at the FFL dealer before taking possession of your firearm.
Can I return the gun if I change my mind?
We do not accept returns once a firearm has been transferred. Always inspect the gun at the FFL dealer before completing the transfer—once you take it home, it’s yours.
What should I do after taking my gun home?
Once your firearm is in your possession, follow these steps:
- Read the manual – Understand how your firearm operates.
- Inspect & clean – Ensure it’s in proper working condition.
- Secure it safely – Store in a gun safe or lockbox.
- Get training – Take a safety course or practice at a range.
- Know your local laws – Understand where and how you can legally carry your firearm.
CMMG Dissent MK4 Semi-Automatic Pistol .300 AAC Blackout 6.5" Barrel (1)-30Rd Magazine Black Polymer Finish
The CMMG DISSENT is an AR Personal Defense Weapon like no other. Incorporating a variety of new features and technologies, each DISSENT is made to maximize portability and modularity, most notably thanks to CMMG’s patent-pending Compact Action that houses the entire recoil system in the upper receiver, eliminating the need for the buffer tube altogether.
Chambered in 300 BLK, this DISSENT packs .30 cal power in an ultra-compact package that offers AR15 ambi controls and our forward non-reciprocating side charger that can be switched for left or right-handed operation. At the rear of the lower receiver is a 1913 picatinny rail section for attaching the brace or stock that fits you best.
Each DISSENT is available in a variety of custom Cerakote finishes to match your style.
SLR Adjustable Gas Block
300 BLK is an incredibly adaptable cartridge with different loadings for specific uses, like suppressed. With the SLR adjustable gas block on each 300 BLK DISSENT you can fine tune the gas system to best suit the supersonic or subsonic ammo loadings you like best.
TriggerTech AR-D 2-Stage Trigger
TriggerTech’s AR-D trigger was developed in collaboration with CMMG to be fully optimized for use with DISSENT firearms and upper receiver groups. With a 4 lb pull weight, the AR-D trigger showcases a light, repeatable break. CMMG does not guarantee optimal DISSENT functionality with Mil-spec or other aftermarket triggers.
Platform: Mk4
Caliber: .300 BLK
Operating System: Compact Action-Direct Impingement
Barrel Length: 6.5
Barrel Twist: 1:7
Barrel Contour: MT
Barrel Material: 4140CM, SBN
Barrel Twist: 1:7
Muzzle Device: CMMG ZEROED Linear Compensator
Muzzle Thread: 5/8 x 24
Gas Port Location: Pistol
Gas Block: SLR Adjustable .750"
Upper Receiver: DISSENT 7075 T6 Aluminum
Lower Receiver: Mk4 Forged 7075 T6 Aluminum
Hand Guard: CMMG 5.5" Proprietary
Finish: Cerakote
Charging Handle: DISSENT Side Charger Left
Pistol Grip: CMMG ZEROED Pistol Grip
Receiver Extension: 1913 Picatinny Rail End Cap
Trigger Type: TriggerTech AR-D 2-Stage
Trigger Guard: CMMG ZEROED Trigger Guard
Safety Selector: CMMG ZEROED 60/90 Degree
Magazine: Magpul 300BLK 30rd PMAG
Weight: 4.8 lbs
Length: 14.7"
Specifications
Gun Brand: CMMG, Inc
Gun Model:
Gun Capacity: 30
Gun Caliber: 300 AAC Blackout
Gun Barrel Length: 6
Gun Finish: Black
Gun Stock / Grip Finish: Polymer
Gun Condition: New
Type Of Gun: Pistol
Gun Function: semi auto
Gun Brand: CMMG, Inc
Gun Model:
Gun Capacity: 30
Gun Caliber: 300 AAC Blackout
Gun Barrel Length: 6
Gun Finish: Black
Gun Stock / Grip Finish: Polymer
Gun Condition: New
Type Of Gun: Pistol
Gun Function: semi auto
Before You Purchase A Gun
What Do I Need To Buy A Gun?
Answer teThe requirements to buy a gun depend on your location, but in the U.S., here are the general steps:
- Age Requirement
- Background Check
- Valid Identification
- Residency Requirement
- Firearm License or Permit (If Required)
- Waiting Period (If Applicable)
- State-Specific Laws
Is it legal to buy a gun online?
Yes, buying a gun online is completely legal in the U.S., but the firearm must be shipped to a Federal Firearms License (FFL) dealer in your state. You’ll need to pass a background check and complete any required paperwork before taking possession of the firearm.
Do I need a background check to buy a gun online?
Yes. Even when purchasing online, a background check is required at the FFL dealer where you pick up your firearm (unless you have a permit that exempts you in your state). The FFL dealer will conduct the check before handing over the gun.
Can I have a gun shipped directly to my house?
No, firearms cannot be shipped directly to your home. They must be sent to a licensed FFL dealer, where you will complete the legal transfer process. However, ammo and accessories can be shipped directly to your residence in most states.
How do I choose an FFL dealer for my transfer?
Many online gun stores allow you to select an FFL dealer during checkout. If not, you’ll need to find a local gun shop or licensed dealer willing to handle the transfer and provide their information to the seller.
After You Purchase A Gun
What happens after I purchase a gun online?
After completing your purchase, your firearm will be shipped to a Federal Firearms License (FFL) dealer near you. You’ll receive tracking information and instructions on how to pick up your firearm.
What do I need to do after purchasing a gun online?
After purchasing, provide the seller with the information of your chosen FFL dealer (they will handle the transfer). Once the firearm arrives at the dealer, you’ll go there, complete the required background check and paperwork, and then take your firearm home after approval.
What do I need to bring when picking up my gun?
When you arrive at the FFL dealer, bring:
- A valid government-issued ID (matching the address on your order).
- Any required permits or licenses (varies by state).
- Payment for the FFL transfer fee (usually $25-$75, depending on the dealer).
Do I have to pass a background check when picking up my gun?
Yes. Even if you bought the gun online, you must pass a background check (NICS) at the FFL dealer before taking possession of your firearm.
Can I return the gun if I change my mind?
We do not accept returns once a firearm has been transferred. Always inspect the gun at the FFL dealer before completing the transfer—once you take it home, it’s yours.
What should I do after taking my gun home?
Once your firearm is in your possession, follow these steps:
- Read the manual – Understand how your firearm operates.
- Inspect & clean – Ensure it’s in proper working condition.
- Secure it safely – Store in a gun safe or lockbox.
- Get training – Take a safety course or practice at a range.
- Know your local laws – Understand where and how you can legally carry your firearm.
IMPORTANT INFO
You must be 18 to purchase rifles or shotguns and 21 to purchase handguns, actions or receivers. All firearms must ship to a valid FFL Dealer and cannot be changed or cancelled after they are placed. If your order contains a handgun which ships from BuyAGun.Shop, the handgun, and any additional firearms shipping from BuyAGun.Shop on the same order, must ship Second Day Air. If your order does not contain a handgun which ships from BuyAGun.Shop, any shotguns, rifles, actions or receivers shipping from BuyAGun.Shop will ship via UPS Ground. The Supplier determines shipping methods for firearms which ship from a Supplier. Shipping charges for firearms are calculated separately from other products on your order and will incur a separate Per Order charge. Due to Federal regulations, guns are not returnable. Please inspect your gun thoroughly before transfer. If the gun received at the FFL Dealer is incorrect or damaged in shipment, do not take possession of the gun and please contact Customer Service. After transfer, any warranty or repair work must be coordinated directly with the gun manufacturer. Firearms refused by the FFL Dealer or which cannot be transferred due to a failed background check will be subject to a 10% restocking fee. By ordering this firearm, you certify you are the actual transferee/buyer of the firearm, are of legal age and satisfy all Federal, State and local legal/regulatory requirements to purchase this firearm.