Geissele Super Duty SD-556 16.1" 5.56 NATO AR-15 Rifle in Desert Dirt Color
The Geissele Super Duty SD-556 pairs battle-proven components with Geissele’s signature Desert Dirt Color finish. Chrome-lined cold hammer forged barrel, Nanoweapon-coated bolt carrier group, and a Geissele-length mid gas system give this 16.1-inch rifle the durability and reliability demanded by agencies like CBP and LAPD SWAT. Factory-equipped with a flat-faced two-stage trigger, ambidextrous controls, and a 13.5-inch Super Modular Rail MK4, this rifle is ready for duty right out of the box.
Condition
Overall Condition: Excellent condition, showing only faint signs of any prior use or handling.
Bore Condition: Excellent - Clean, mirror finish, no signs of wear.
Bore Rifling: Excellent Rifling - Sharp lands and grooves.
Specific Condition Notes: Minimal markings from previous handling or use. Bore is bright and clean.
What’s Included
- One 30-round polymer AR-15 magazine
- Polymer short vertical foregrip (M-LOK, installed)
This Super Duty features Geissele’s 16.1-inch, chrome-lined, cold hammer forged barrel with a 1:7 twist and 1/2x28 muzzle threads, giving shooters long-term wear resistance and broad muzzle device compatibility.
The Nanoweapon-coated Reliability-Enhanced bolt carrier group reduces friction and resists corrosion, while the Super-42 braided buffer spring smooths recoil impulse for consistent cycling.
A 13.5-inch Super Modular Rail MK4 offers full-length M-LOK slots and a rigid mounting surface for lights, lasers, and accessories without adding excess weight.
Controls are fully ambidextrous, including the Super Configurable safety selector, ACH charging handle, and maritime bolt catch, enabling efficient manipulation from either shoulder.
The flat-faced, two-stage Geissele Lightning Bow trigger delivers a consistent 4-pound pull, helping shooters maximize accuracy from the adjustable six-position stock and B5 Systems Type 23 grip.