The Sig Sauer M400 Tread V2 TacPac 5.56 NATO Rifle with ROMEO MSR red dot is a modern AR-15 package built to be ready the moment it leaves the box. A 16" stainless steel, threaded barrel capped with a 3-prong flash hider pairs with a lightweight free-floating M-LOK handguard to deliver consistent accuracy and easy mounting for lights, grips, and other accessories. The mid-length gas system and Magpul SL-K adjustable stock work together to keep recoil manageable and handling smooth, while ambidextrous controls and an integrated QD sling mount support comfortable operation from either shoulder.

This TacPac configuration adds real value for the shooter by including the ROMEO MSR red dot sight, three 30-round AR-15 magazines, and a padded Savior Equipment Specialist rifle case for secure transport and storage. Chambered in 5.56 NATO / .223 Rem with a 30+1 capacity, the M400 Tread V2 is well suited for range practice, training, and general-purpose defensive use where reliability and ease of use matter. Thoughtful ergonomics, a crisp trigger, and Sig Sauer’s attention to detail make this rifle a dependable choice for shooters who appreciate practical performance and refined design.

Key Features:

• Manufacturer: Sig Sauer
• Model: M400 Tread V2 TacPac
• Caliber: 5.56 NATO / .223 Remington
• Condition: New
• Action: Semi-Automatic
• Barrel Length: 16" Stainless Steel, Threaded
• Number of Magazines: 3
• Capacity: 30+1
• Optic Footprint: ROMEO MSR Red Dot Included
• Unique Features: Free-Floating M-LOK Handguard, Mid-Length Gas System, Ambidextrous Controls, Magpul SL-K Adjustable Stock
• Night Sights: No
• External Safety: Ambidextrous Safety Selector
• Threaded Barrel: Yes
• What's In The Box: Rifle, ROMEO MSR Optic, (3) 30-Round Magazines, Savior Equipment Specialist Rifle Case
• Weight: 7 lbs
• Length: 30.8" Overall
• Width: 2.5"