The Griffin Armament MK2 Patrol is a semi-automatic, AR-15 style carbine chambered in 5.56 NATO (also compatible with .223 Remington) with a pinned 14.5-inch barrel. It is built on a fully ambidextrous lower with aerospace-manufactured, sub-mil-spec tolerances, and the barrel is machined from 416R stainless steel with a tuned mid-length gas system. 
 

Key Specifications 

• Brand: Griffin Armament 
• Model: MK2 Patrol 
• Caliber: 5.56 NATO 
• Action: Semi-Automatic 
• Capacity: 30+1 rounds 
• Barrel Length: 14.5 in 
• Barrel Material: 416R Stainless Steel 
   

Detailed Features 

• Fully ambidextrous lower gives mirrored controls for faster manipulation from either shoulder. 
• Suppressor-optimized buffer system and tuned mid-length gas setup are built for reliable cycling suppressed or unsuppressed. 
• Griffin ECS stock and modular rail system provide practical mounting points and adjustable fit. 
• Suppressor-compatible muzzle setup supports running a suppressor without additional parts.

Owners of the Griffin Armament MK2 Patrol consistently point to premium build quality, citing the ambidextrous controls and stainless barrel as signs of a rifle built to a higher standard than typical AR-pattern carbines. The 416R stainless barrel is often mentioned as a durability advantage for owners who shoot suppressed regularly.

The fully ambidextrous lower is a standout feature for left-handed shooters, who often struggle with mirrored controls on other AR-platform rifles. The Griffin ECS stock and rail system get generally positive marks for comfort and adjustability, though some owners swap the factory furniture for personal preference.

Because the MK2 Patrol is tuned specifically for suppressed use, owners running a suppressor report smooth, reliable cycling, while some note the gas system runs a bit different unsuppressed compared to a standard AR-pattern carbine. Griffin's price point sits above many mainstream AR builds, but most owners feel the machining quality and ambidextrous design justify the premium.