Geissele Defense Pistol GDP MOD1 300 Blackout 8" Bbl Ambidextrous Black Pistol 08-688B

The Geissele Defense Pistol GDP MOD1 300 Blackout 8" in black is a compact AR-pattern pistol built for reliable performance in a maneuverable package. This GDP 300 runs a cold hammer forged 8-inch barrel with a 1:7 twist, optimized to stabilize both supersonic and subsonic .300 Blackout loads — ready for suppressed or standard ammunition without swapping components.

A pistol-length gas system keeps cycling consistent at this barrel length, backed by a Reliability Enhanced BCG for smooth operation shot after shot. The Geissele SSA two-stage trigger delivers a crisp break that outperforms typical factory triggers. Fully ambidextrous controls improve ergonomics for any shooter, regardless of hand dominance.

Up front, the free-float MK16 M-LOK handguard and full-length Picatinny rail keep the platform optics-ready and open to accessories without affecting barrel harmony. This Geissele GDP — also referred to as the Geissele Defence Pistol GDP MOD 1 — includes one 30-round magazine and an adjustable pistol brace, rounding out a durable, versatile defensive platform in a straightforward black finish.

Order the Geissele MOD 1 GDP 300 Blackout in black today and get an 8" pistol built for dependable, everyday performance.

Key Features

• 8" cold hammer forged barrel, 1:7 twist — supersonic and subsonic capable
• Pistol-length gas system for reliable short-barrel cycling
• Geissele SSA two-stage trigger
• Reliability Enhanced BCG for smooth cycling
• Fully ambidextrous controls
• Free-float MK16 M-LOK handguard with full-length Picatinny rail
• Includes one 30-round magazine and adjustable pistol brace