Geissele Automatics Super Duty MOD 1 Heavy Barrel 5.56 NATO Complete Upper Receiver - 16" - DDC

The Geissele Automatics Super Duty MOD 1 Heavy Barrel 5.56 NATO Complete Upper Receiver is a 16-inch upper designed for high-volume shooting with duty-grade performance. This rifle features a cold hammer forged, chrome-lined Super Heavy Barrel with a .812 gas journal, reinforced straight gas tube, and custom Super HBAR gas block, offering consistent reliability under extreme use. A 15-inch MK16 Super Modular Rail provides robust accessory mounting and includes stainless QD sling inserts for added durability. This upper features a Nanoweapon-coated Reliability Enhanced BCG, HUXWRX Flash Hider-QD muzzle device, and ambidextrous Airborne Charging Handle. Made in the United States.

Features:

• 16" cold hammer forged, chrome-lined Super Heavy Barrel with 1:7 twist
• .812 gas journal with reinforced Super HBAR gas block
• Straight Super HBAR gas tube for enhanced heat mitigation
• Nanoweapon-coated Reliability Enhanced Bolt Carrier Group
• Geissele Stressproof Bolt with Asymmetric Cam Pin
• 15" MK16 Super Modular Rail with Geissele Center Tab and stainless QD inserts
• Geissele-length gas system
• Nanoweapon-coated HUXWRX Flash Hider-QD muzzle device
• 5/8x24 muzzle thread pitch
• Airborne Charging Handle
• Super Duty upper receiver with cam pin cut-out
• Made in the USA