Geissele Defense Pistol GDP 300 Blackout 8" Bbl DDC Pistol 08-607S

Geissele Defense Pistol GDP 300 Blackout 8" Bbl DDC Pistol 08-607S takes the GDP's compact platform and pairs it with a chambering built specifically for the job — full-power supersonic performance when you need reach, and a genuinely quiet subsonic option once a suppressor's threaded on.

The Geissele Defense Pistol GDP 300 Blackout runs an 8" cold hammer forged, chrome-lined barrel with a 1:7 twist, paired with a custom pistol-length gas system through Geissele's Antistrike Super Compact Gas Block. The Phased Array® gas port with Tri-Port™ metering keeps cycling smooth across that wide range of 300 BLK loads, which is usually where a less-tuned gas system starts to feel inconsistent. A GFW bolt carrier group with an M4 bolt assembly and Stressproof Bolt backs it up — full-auto rated internals in a semi-auto pistol, because that's just Geissele's baseline.

This Geissele GDP's brace is worth calling out on its own — a dual-telescoping design that opens with one rearward pull and locks into two solid positions without any fumbling. A 7" MK16 M-LOK handguard in DDC keeps the front end tight, and the SSA X® Wide Body Lightning Bow trigger delivers a break that feels intentional, not like a compact-build compromise.

Key Features:

• 8" cold hammer forged, chrome-lined barrel, 1:7 twist, 300 BLK
• Custom pistol-length gas system w/ Antistrike Super Compact Gas Block
• Geissele Phased Array® gas port w/ Tri-Port™ metering
• GFW bolt carrier group w/ Geissele Stressproof Bolt
• SSA X® Wide Body Lightning Bow trigger
• Dual-telescoping GDP brace
• 7" MK16 M-LOK handguard, Desert Dirt Color finish
• HUXWRX Flash Hider-QD 762

This Geissele pistol is built for shooters who need 300 Blackout's dual-role ballistics in a genuinely compact package.