The Geissele Super Duty Mod1 5.56 rifle with a 14.5-inch barrel (brand part no. 08-396B) is a premium, mil-spec-plus AR-15 from Geissele Automatics, built around the company’s own trigger, rail and charging handle. The cold hammer forged, chrome-lined barrel is cut with a 1:7 twist and wears a pinned-and-welded HUXWRX Flash Hider-QD 556 that brings the barrel to 16 inches overall. A mid-length gas system feeds a Nanoweapon-coated Reliability Enhanced bolt carrier group, and the SSA-E X trigger handles the break. The rifle is finished in black and ships without a magazine, so you can run the magazines you already own. It suits a duty-style carbine build, a competition rifle or a hard-running range gun.

Key Specifications

• The chambering is 5.56 NATO, the standard carbine cartridge with the widest ammunition selection.
• The barrel is 14.5 inches of cold hammer forged, chrome-lined steel, a length that keeps the rifle quick to handle.
• The muzzle device is a HUXWRX Flash Hider-QD 556 pinned and welded in place, which brings the barrel to 16 inches overall.
• The twist rate is 1:7, which stabilizes the heavier bullet weights common in 5.56 loads.
• The gas system is mid-length with a Super Compact Gas Block and a .076-inch gas port, a setup that smooths cycling on a 14.5-inch barrel.
• The bolt carrier group is a Nanoweapon-coated Reliability Enhanced BCG with a forged Stressproof bolt, built to hold up to long round counts.
• The trigger is the SSA-E X with Lightning Bow, which pairs light takeup with a crisp second-stage break.
• The handguard is a 13.5-inch MK16 rail with Geissele’s Center Tab mating, which keeps the front end rigid and leaves room for lights and grips.
• The stock is a B5 Systems Enhanced SOPMOD on a mil-spec buffer tube with a QD endplate, so a sling attaches directly at the rear.
• The charging handle is the Airborne Charging Handle, a Geissele upgrade over a standard mil-spec handle.

Frequently Asked Questions

Is the 14.5-inch barrel the full length of the barrel assembly? The barrel itself measures 14.5 inches, and the HUXWRX Flash Hider-QD 556 is pinned and welded to it so the barrel assembly measures 16 inches overall. The muzzle device is a permanent part of the rifle.

Does it come with a magazine? No. The rifle ships without a magazine, so you can add the AR-15 magazines you already own.

What trigger does the Super Duty Mod1 use? It uses the Geissele SSA-E X trigger with a Lightning Bow, which sits between a classic M4 trigger and a flat-bow design with light takeup and a crisp break.

Buy the Geissele Super Duty Mod1 5.56 NATO Rifle, 14.5-Inch Barrel, Black, No Magazine

Super Duty rifles are bought for the parts you would otherwise upgrade yourself, and here the trigger, rail, stock and charging handle all arrive installed. Order it from our Lubbock, Texas gun shop for fast, insured shipping to your FFL, and see more AR rifles while you are here.