Geissele URG-I | 5.56 NATO | DDC M-LOK Handguard

The Geissele URG-I is a complete AR-15 upper built around the Super Modular Rail MK 16 handguard, a hammer-forged chrome-lined barrel, and a carbine gas system. It is chambered for .223 Rem / 5.56 NATO and uses a MIL-Spec M4 receiver profile and Government contour barrel for familiar handling. The URG-I is a near-clone of the upper receiver group used by USASOC and was designed to take advantage of modern ammunition performance.

Typical applications include precision-oriented range training and competition or duty-style systems where modularity and durability are priorities.

Product Specifications

• The manufacturer is Geissele Automatics.
• The model is listed as URG-I.
• The upper is intended to fit AR-15 platforms.
• The product type is a Complete Upper Receiver.
• The cartridge specification is .223 Rem / 5.56 NATO.
• The barrel is described as Chrome Lined Steel.
• The barrel finish is Black.
• The rate of twist is 1:7″.
• The handguard finish is DDC (Desert Dirt Color).
• The receiver description is MIL-Spec M4.
• The handguard interface is M-LOK.
• The barrel contour is listed as Government.
• The external finish is Anodized.
• The product subcategory is Complete Upper Receivers.
• The UPC is 817953025215.

This URG-I upper combines Geissele’s modular MK 16 handguard with a chrome-lined barrel and proven carbine gas system for consistent performance in sustained use. Its M-LOK handguard and MIL-Spec receiver shape make it straightforward to integrate onto an AR-15 lower for range work, competition setups, or duty-style configurations where reliable parts and conservative ergonomics are valued.