Daniel Defense GL/SSC Upper Receiver Group URG 5.56mm

Manufacturer	Daniel Defense
System Compatibility	5.56mm NATO / .223 Remington Special Operations Upper Receiver Groups
Product Type	Complete Upper Receiver Group (URG) – Title 1 Component
Barrel Specifications	12.5″ Government Profile, Cold Hammer Forged, 1:7 Twist, Chrome Lined
Rail System & M203	Free-Floating GL/SSC RIS II with Integrated Hanger System
Gas System & Weight	Carbine-Length Direct Impingement \| Product Weight: 3.9 lbs
Requirement Note	Title 1 Component; Assembly into SBR Regulated Under NFA Rules

Authorized Distributor for Daniel Defense Government Sales. PAI Defense is a premier holder of state and federal contracts, specializing in the deployment of elite tactical systems for military, law enforcement, and corrections clients. The legendary GL/SSC Upper Receiver Group (URG)—once an ultra-rare platform with only a handful ever reaching civilian hands—returns as a production-grade reality without workarounds or compromises. Built around a 12.5-inch Cold Hammer Forged Government profile barrel and a carbine-length gas system, the GL/SSC URG features the iconic free-floating GL/SSC RIS II rail with an integrated hanger system, providing direct M203 grenade launcher and suppressor compatibility without affecting barrel harmonics or requiring custom modifications.

Procurement Strategy: This specialized armory equipment is restricted to professional agency acquisition and dealer transfer. Please reach out to us to ask for a quote or submit a request for proposal (RFP).
Ecosystem Compliance: As a fully licensed Type 10 FFL and SOT (Special Occupational Taxpayer), PAI Defense is fully authorized to supply your agency or qualified personnel with regulated firearm platforms, upper receiver groups, and supporting tactical hardware under streamlined government contracts.

Description

The Return of a Legend: Uncompromised Military Heritage Some firearms and components achieve mythical status due to their rarity and specialized utility. The GL/SSC was historically so unobtainable that builders went to extraordinary lengths just to approximate its configuration. Now available for professional deployment, the GL/SSC URG delivers the authentic, uncompromised upper receiver architecture demanded by specialized military and law enforcement end-users.

Integrated GL/SSC RIS II Rail & M203 Compatibility

Free-Floating GL/SSC RIS II Rail: Unlike standard aftermarket setups, the GL/SSC rail integrates all M203 grenade launcher mounting components directly into the handguard structure. This allows operators to mount launchers and suppressors securely without introducing pressure or shifting harmonics on the barrel.
12.5″ Cold Hammer Forged Barrel: Constructed from Chrome Moly Vanadium steel with a 1:7 twist, chrome lining, and heavy phosphate coating. Individually HP/MPI tested, the 12.5-inch Government profile barrel strikes the ultimate balance between compact CQB maneuverability and ballistic velocity in 5.56mm NATO.
Carbine-Length Gas System & Muzzle Integration: Engineered around a reliable carbine-length direct impingement gas system and capped with a standard DD A2 flash hider (1/2×28 TPI), offering seamless suppressor readiness in a lightweight 3.9 lb package.

Important Regulatory Note (NFA Assembly Warning) As a standalone upper receiver group, this component is transferred as a standard Title 1 part. However, once assembled onto a lower receiver to create a complete firearm with a barrel length under 16 inches, the resulting unit becomes a regulated item under the National Firearms Act (NFA). It is the buyer’s and agency armorer’s responsibility to ensure compliance with all applicable NFA rules and local laws. PAI Defense assists agency compliance officers in streamlining complete SBR procurement and Form 3/4 transfers.

PAI Defense: Your Fully Licensed Procurement Partner Navigating government acquisitions for specialized tactical weapon systems requires a strategic, compliant B2B approach. PAI Defense provides the audited technical specifications and streamlined RFP processes necessary to support procurement officers. By utilizing our Type 10 FFL and SOT licensing, your agency gains direct, lawful access to elite specialized systems designed to keep your operators safe and operational divisions at peak efficiency.