Geissele Super Duty MOD1 Upper | 5.56 | 14.5″

The Geissele Super Duty MOD1 Complete Upper is a factory-built AR-15 upper assembly chambered for .223 Rem/5.56 NATO with a 14.5″ pinned barrel. It combines a chrome-lined, cold hammer forged barrel and a modular rail system with a Geissele Reliability Enhanced bolt carrier group to provide a robust parts set for duty-style and precision-friendly applications. The assembly is finished in black anodize and ships as a complete upper receiver package.

Product Specifications

• The barrel length is 14.5″ Pinned (16″ OAL).
• The caliber is .223 REM/5.56 NATO.
• This unit is classified as an Upper.
• The subcategory is Complete Upper Receivers.
• The model is SUPER DUTY MOD1.
• Designed to fit AR-15 platforms.
• The finish is Anodized.
• The handguard features M-LOK attachment points.
• The color is Black.
• The style is Complete.
• The listed length is 14.5″.
• The cartridge specification is .223 REM/5.56 NATO.
• The barrel contour is identified as Geissele.
• The UPC is 810081133692.

Built around a chrome-lined, cold hammer forged barrel and a nanoweapon-coated flash hider / QD device, this complete upper pairs a carbine-length gas system and Geissele Super Compact Gas Block with a 13.5″ Super Modular Rail MK16. The included Reliability Enhanced bolt carrier group uses a forged Carpenter 158+ Stressproof bolt and Nanoweapon coatings to increase wear resistance and longevity. These features make the Super Duty MOD1 suited to precision-oriented shooting and professional/tactical training where durability and repeatable function are priorities.

Owners and operators commonly praise the Super Duty MOD1 for its build quality and consistent reliability under extended use.