The Geissele Automatics Border Patrol SD-556 is a meticulously engineered service rifle, designed to offer exceptional performance with mil-spec features. It boasts a Geissele cold hammer-forged barrel with a chrome-lined bore, ensuring durability and precision. The rifle's 16-inch barrel and 5.56x45mm NATO chamber make it versatile for various applications, from range shooting to training.

Ideal for enthusiasts seeking a reliable AR-15, the Border Patrol rifle is lightweight yet robust, featuring a MK 20 Super Modular Rail with M-Lok compatibility. Geissele's reputation for innovation is evident in its advanced components, such as the ambidextrous charging handle and posi-lock safety.

Key Features:
- Manufacturer: Geissele Automatics
- Model: SD-556
- Caliber: 5.56 NATO
- Condition: New
- Action: Semi-Automatic
- Finish Color: Black
- Barrel Length: 16.00"
- Number of Magazines: 0
- Capacity: Standard AR-15
- Optic Footprint: M-Lok
- Unique Features: Cold hammer-forged barrel, chrome-lined bore
- Night Sights: No
- External Safety: Yes
- Threaded Barrel: No
- What's In The Box: Rifle only
- Weight: 6 lbs 6 oz
- Length: 36"
- Width: Not specified