The Pre-Owned Geissele Automatics SD-556 brings Geissele’s well-known precision to a compact AR-style platform chambered in 5.56 NATO. Built around an 11.5" barrel with a low-profile gas system and open flash hider, this SD-556 offers smooth cycling and reliable performance in a lightweight configuration. The rifle features a free-floating, skeletonized handguard with a full-length Picatinny rail for mounting optics and accessories, along with a robust aluminum receiver set and ergonomic pistol grip.

This SD-556 is configured with a brace-style rear assembly and a single 30-round magazine, making it a practical choice for range use, training, or general-purpose defensive roles where a compact footprint is preferred. The open-top rail and modular handguard allow shooters to tailor the setup with their preferred sights, lights, or sling mounts. As a pre-owned firearm, it delivers Geissele quality at a more accessible price point, backed by the brand’s reputation for meticulous machining and thoughtful design.

Key Features:

• Manufacturer: Geissele Automatics
• Model: SD-556
• Caliber: 5.56 NATO
• Condition: Pre-Owned
• Action: Semi-Automatic
• Barrel Length: 11.5"
• Number of Magazines: 1
• Capacity: 30
• Threaded Barrel: Yes
• What's In The Box: Firearm, Magazine