The Geissele Super Duty MOD1 Rifle is a semi-auto 5.56 NATO AR-pattern rifle built around a 16-inch heavy barrel, a threaded HUXWRX flash hider and a black finish (Geissele part no. 08625B). The heavy-profile barrel is cold hammer forged and chrome lined, so it can take sustained rates of fire without losing accuracy. An SSA-E X two-stage trigger, an ambidextrous Super Configurable Safety and an Airborne Charging Handle handle the controls. A 15-inch MK16 rail, a B5 Systems Enhanced SOPMOD stock and an A17 grip round out a rifle from Geissele Automatics aimed at duty, competition and hard range use.

Key Specifications

• Chambering is 5.56mm NATO, the standard AR-15 service cartridge with the widest ammunition selection.
• The barrel is a 16-inch Geissele heavy barrel, cold hammer forged and chrome lined with a 1-7 twist for durability and accuracy under sustained fire.
• The muzzle is threaded 1/2×28 and carries a HUXWRX Flash Hider-QD 556, so compatible muzzle accessories thread straight on.
• The trigger is a SSA-E X two-stage with Lightning Bow, a wide-body bow shape with Nanoweapon-coated components for smooth, controllable pulls.
• The safety is a Super Configurable Safety Selector, an ambidextrous selector that works from either side of the lower.
• The charging handle is the Airborne Charging Handle, which gives the shooter easy, positive control of the bolt carrier.
• The handguard is a 15-inch MK16 rail with a Geissele center tab, giving room for lights, grips and other accessories.
• The stock is a B5 Systems Enhanced SOPMOD on a mil-spec 6-position tube with a Geissele QD endplate.
• The grip is the Geissele A17, a modernized design that sits the hand comfortably behind the trigger.
• Overall length runs 33 3/4 to 36 7/8 inches from collapsed to extended, and the rifle weighs about 7.6 pounds.

Frequently Asked Questions

Does this rifle come with a magazine? No. It ships without a magazine and does not include an optic or scope mount, so you will supply those separately.

Is the barrel threaded? Yes. The muzzle is threaded 1/2×28 and wears a HUXWRX Flash Hider-QD 556, which Geissele pairs with its HUXWRX FLOW series of muzzle accessories.

What gas and buffer system does it use? A Super Compact Gas Block with a .750 gas journal, a Super 42 braided buffer spring and an H2 buffer, running a Reliability Enhanced Bolt Carrier Group with a Stressproof Bolt.

Buy the Geissele Super Duty MOD1 Rifle, 16-Inch Heavy Barrel, 5.56 NATO

The MOD1 heavy barrel version of the Super Duty pairs a barrel that handles long strings of fire with the controls Geissele is known for. For more rifles in this style, browse our semi-auto rifles lineup. Order it from our Lubbock, Texas gun shop for fast, insured shipping to your FFL.