Geissele Super Duty SD-556 MOD 1 5.56 NATO, 16 in AR-15 Rifle, Ambidextrous Controls, Airborne Charging Handle, Matte Black
This Geissele Automatics Super Duty SD-556 MOD 1 is a factory "MOD 1, 16", Black" configuration confirmed by the matching box label and receiver serial. It features ambidextrous controls, a Geissele Airborne Charging Handle, and a Geissele-marked bolt carrier. The rifle is in excellent condition and comes with a 30-round Magpul PMAG and original factory packaging.
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: There are minimal markings from previous handling or use. The bore is bright and clean.
What’s Included
- Geissele Super Duty SD-556 MOD 1 5.56mm rifle
- Geissele factory box with label 'Super Duty Rifle Mod 1, 16", Black' (model SD-556)
- Owner's manual
- One 30-round Magpul PMAG GEN M2 MOE polymer magazine
The Super Duty SD-556 MOD 1 is built on the AR-15 platform with a 16-inch barrel and a direct impingement, semi-automatic action. It is chambered in 5.56mm NATO and finished in matte black. The lower receiver is marked "SD-556" and "SUPER DUTY," affirming its place within Geissele's Super Duty series.
Controls are fully ambidextrous where it matters: an ambidextrous safety selector, an ambidextrous magazine release with a G-marked lever, and a bolt catch/release. The Geissele Airborne Charging Handle (PN 05-497) features ambidextrous, low-profile latches for confident operation.
The rifle uses a free-float aluminum M-LOK handguard with a full-length, numbered Picatinny top rail and a secure two-bolt clamp. The barrel is threaded 1/2x28 and fitted with a three-prong flash hider. A forward assist and ejection port dust cover round out the upper, while a Geissele-marked bolt carrier supports the proven operating system.
Furniture includes a B5 Systems adjustable carbine stock with an integral QD sling socket and a textured polymer pistol grip. Length of pull is 11.25 inches. Made in the USA, this configuration delivers 30+1 capacity and comes ready with a Magpul PMAG GEN M2 MOE 30-round magazine.