Geissele URG-I Upper Receiver Group 5.56 NATO 14.5″

The Geissele URG-I upper receiver group pairs a Super Modular Rail MK16 handguard with a hammer-forged, chrome-lined barrel and a mid-length gas system. It is built to perform with modern 5.56 NATO and was designed to accommodate the rigors of M855A1 (AB57) ammunition. This configuration is a near-clone of the USASOC URGI upper currently in service.

Key Specifications

• Model: URG-I.
• Caliber: .223 Rem / 5.56 NATO.
• Barrel length: 14.50 inches.
• Barrel description: Chrome lined steel.
• Rate of twist: 1:7.
• Handguard type: M-LOK.
• Handguard finish/color: Desert Dirt Color (DDC).
• Receiver description: MIL-Spec M4.
• Barrel contour: Government.
• Overall finish: Anodized.

This URG-I upper delivers a purpose-built platform for shooters who need a reliable, service-oriented AR-15 upper in a near-clone USASOC configuration. With a chrome-lined hammer-forged barrel, mid-length gas system, and a robust M-LOK MK16 handguard in Desert Dirt Color, it integrates into standard AR-15 systems and supports a range of field and training applications where durability and consistency matter.