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ARMSCO MKS-12 SPORT 12 GA
Guns International #: 102976218 Seller's Inventory #: 507201
Category: Rock Island Armory Shotguns - Tactical Shotguns
Seller's Information
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Seller: Guns Dot Com
Member Since: 9/8/21
State: Minnesota
Zip: 55337
Country: United States
Phone: (866) 582-4867
Platinum Seller
Number of Active Listings: 40284
Total Number of Listings: 410062
Seller: FFL Dealer
Return Policy: 3 day inspection and return policy on used guns.
CERTIFIED USED GUNS Guns Certified Used Guns may be returned within 3 days after the transfer is complete for any reason for a full refund, minus any fees, shipping costs and a 15% restocking fee. A Guns Certified Used Gun may also be returned within 7 days if it is malfunctioning with proper use. NON-CERTIFIED USED GUNS Non-certified used guns can be returned if there is a mechanical defect that occurs within 3 calendar days of the physical transfer of the firearm to your possession. All other reasons for returns on non-certified used guns are ineligible.
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Description:
Guns Listing ID: 507201
ARMSCO MKS-12 Sport – 12 Gauge Shotgun
Mag-fed, semi-automatic 12GA tactical shotgun with AR-style ergonomics
?? Overview:
The MKS-12 Sport is a semi-auto 12 gauge shotgun built to mirror the AR-15 rifle platform in ergonomics and control layout. It combines the power of a shotgun with the modularity and familiarity of the AR platform — designed for tactical shooting, home defense, and sport use. The magazine-fed system gives it faster reloads compared to traditional tube-fed shotguns.
?? Key Specifications:
Gauge: 12 Gauge
Chamber: 2-"\" and 3\" shells
Action: Gas-operated, semi-automatic
Magazine: Detachable box magazine (commonly 5-round, 10-round optional)
Barrel Length: ~18.5\"
Overall Length: ~39–40\"
Receiver: Steel or aluminum alloy
Stock: Collapsible or fixed AR-style stock
Pistol Grip: Standard AR-style grip
Forend: M-LOK or Picatinny rail handguard
Sights: Flip-up or removable AR-style iron sights; flat-top upper for optics
Muzzle Device: Muzzle brake or flash hider (threaded barrel)
Weight: ~8–9 lbs (varies by setup and mag)
? Key Features:
AR Ergonomics: Familiar controls for anyone used to the AR-15 platform (mag release, safety, grip)
Magazine-fed: Quick reloads compared to traditional pump or tube-fed shotguns
Modular Design: Flat-top upper allows mounting red dots, scopes, or other AR-style accessories
Rails/Slots: M-LOK or Picatinny rail handguard allows for lights, grips, etc.
Gas System: Helps reduce recoil, especially with heavier loads
Aggressive, tactical appearance — modern design aesthetics
?? Ideal Use Cases:
Home defense: Quick-handling and fast reloads
Tactical or range shooting: Fun and functional for practical shooting courses
3-Gun Competition: Some models adapted for competitive use
Sport shooting: Adaptable and optics-ready
?? Notes to Consider:
Ammunition sensitivity: Like many semi-auto shotguns, the MKS-12 may cycle best with higher-velocity or heavier loads until broken in
Magazine compatibility: Uses proprietary mags; check for availability and aftermarket support
State/legal compliance: Magazine-fed shotguns are restricted in some areas — always check your local laws
SOLD
Manufacturer: ARMSCO
Model: MKS-12 SPORT
Condition: Used - Non-Certified
Barrels: 20
Action: SEMI AUTOMATIC
Gauge Info: 12 GA
Finish: black