Geissele Super Duty Mod 1 5.56 NATO Upper Receiver Group – 14.5" Barrel, AR-15 Compatible

The Geissele Super Duty Mod 1 upper receiver group delivers a complete 5.56 NATO/.223 Wylde configuration for AR-15 pattern lowers. This 14.5" barrel upper comes with a pinned and welded muzzle device to meet the 16" legal requirement for rifles, eliminating NFA paperwork while maintaining a compact fighting carbine profile. Chambered for 5.56 NATO with .223 Wylde accuracy, this upper is built for duty use, defensive applications, and precision training.

Constructed with a forged 7075-T6 aluminum upper receiver and mil-spec barrel extension. The 14.5" cold hammer-forged barrel features a mid-length gas system for reliable cycling and reduced recoil impulse. Black hardcoat anodized finish throughout. Includes bolt carrier group, charging handle, and Geissele Super Modular Rail MK16 handguard. Drop-in installation on any mil-spec AR-15 lower receiver—no gunsmithing required for assembly.

• Caliber: 5.56 NATO / .223 Wylde
• Type: Complete upper receiver group
• Compatible Lower: AR-15 / M4 mil-spec
• Barrel Length: 14.5" (pinned and welded muzzle device)
• Material: 7075-T6 aluminum upper, cold hammer-forged barrel
• Finish: Black hardcoat anodized
• Includes: Bolt carrier group, charging handle, MK16 handguard, pinned/welded muzzle device
• Installation: Drop-in fit for mil-spec AR-15 lowers