The M4A1 RIII is built around a 14.5 inch Cold Hammer Forged Government Profile barrel with a permanently attached Daniel Defense Flash Suppressor. This rifle also comes with the ergonomic Daniel Defense Buttstock and Pistol Grip.

Explore the all-new RIII™ system from Daniel Defense, which includes rifles, uppers, and rails. The lightweight, free-float, aircraft-grade aluminum RIS III rails make the RIII system the toughest and most modular rifle system on the market today.

It features a 12.5 inch lightweight RIS III rail—modeled after the revolutionary RIS II two-piece handguard developed for SOCOM—features M-LOK attachment for lighter weight. All Daniel Defense complete upper receiver groups come standard with an M16 profile bolt carrier group.

Adding to their extremely successful line of stripped M4A1 uppers, Daniel Defense now has the stripped M4A1 upper with their RIII rail! This stripped M4A1 AR15 style Upper Receiver Group is built around a 14.5 inch Cold Hammer Forged M4 Profile barrel and a mid-length gas system.

The Daniel Defense M4A1 AR-15 Upper Receiver Group is designed for superior performance and durability. At the core of this upper receiver group is a 14.5-inch Cold Hammer Forged M4 Profile barrel, featuring a permanently attached Daniel Defense Flash Suppressor.

Jan 28, 2022 · Daniel Defense took its battle-tested M4A1 design and made it even more operator friendly by adding a fully ambidextrous lower to provide right- and left-handed shooters with more flexibility and control.

The M4A1 RIII AR15 style firearm features a fully ambidextrous lower that allows both left- and right-handed shooters to operate the bolt catch, safety selector, and magazine release without having to move or remove their dominant hand from the rifle’s grip. Its GRIP-N-RIP Charging Handle is ambidextrous as well.

It features a 12.5 inch lightweight RIS III rail—modeled after the revolutionary RIS II two-piece handguard developed for SOCOM—features M-LOK attachment for lighter weight while still offering M203 grenade-launcher attachment. UPPER RECEIVER: Mil-Spec with Indexing Marks and M4 Feed Ramps.