The Geissele Automatics GDP 300BLK is a compact, precision-driven firearm engineered for reliability, control, and performance in confined and dynamic environments. Built around an 8-inch cold hammer forged barrel with a 1:7 twist, this platform is optimized for the full spectrum of .300 Blackout loads, delivering consistent accuracy and durability under hard use.

Designed with Geissele’s proprietary Phased Array gas system and Tri-Port balancing technology, the GDP offers exceptionally smooth recoil characteristics and reliable cycling, even in short-barrel configurations. The M-LOK handguard provides a lightweight, rigid mounting solution for accessories while maintaining excellent ergonomics and heat management.

Finished in a clean black anodized coating, the GDP 300BLK maintains a low-profile tactical appearance while showcasing Geissele’s renowned build quality and attention to detail. Ideal for range use, training, or advanced recreational shooting, this firearm represents Geissele Automatics’ commitment to innovation, performance, and precision engineering.

Key Features

• Compact .300 Blackout platform optimized for short barrels

• Cold hammer forged barrel for long-term durability

• Smooth recoil and reliable cycling via Geissele gas system

• Lightweight M-LOK handguard for modular accessory mounting

• Premium Geissele components throughout