Daniel Defense M4A1 5.56mm NATO 14.5" Pinned and Welded 16" Rifle

Overview

The Daniel Defense M4A1 is a semi-automatic direct-impingement rifle built around the military-proven RIS II rail system and a durable cold hammer forged barrel. Its 14.5-inch barrel is fitted with a pinned and welded 1.5-inch flash hider to achieve a compliant 16-inch length, while the full-length top rail and ambidextrous controls provide versatile handling and accessory integration.

Key Features

• M4A1 RIS II free-float rail system
• Cold hammer forged barrel for durability and accuracy
• Full-length optics rail supports a wide range of sighting systems
• Ambidextrous safety selector
• Multiple quick-detach sling attachment points
• Pinned and welded flash hider achieves a 16-inch overall barrel length
• Glass-filled polymer stock with soft-touch overmolding
• Includes one Daniel Defense 32-round magazine

Specifications

• Manufacturer: Daniel Defense
• Model: M4A1
• Caliber: 5.56mm NATO
• Action: Semi-automatic direct impingement
• Barrel Length: 14.5 inches
• Legal Barrel Length: 16 inches with pinned and welded flash hider
• Barrel Twist: 1:7
• Barrel Thread Pitch: 1/2×28 TPI
• Overall Length: 31.5–34.75 inches
• Weight: 6.74 pounds
• Safety: Ambidextrous
• Stock Material: Glass-filled polymer with soft-touch overmolding
• Rail System: Daniel Defense M4A1 RIS II
• Magazine Included: One 32-round Daniel Defense magazine
• Iron Sights: Not included

MPN: SB-22
UPC: 818773025362

Applications

The M4A1 is suited for tactical training, competition, recreational range shooting, property defense, and general-purpose carbine use. Its free-float rail, optics-ready design, and balanced dimensions support customization for a variety of shooting roles.

Additional Features

The RIS II rail provides M-LOK accessory compatibility and a continuous top rail for optics and backup aiming systems. The pinned-and-welded muzzle configuration offers the handling benefits of a 14.5-inch barrel while meeting the specified 16-inch length requirement.