The Geissele Mid-Range Gas Gun (MRGG) was born from the Very Long-Range Semi-Automatic Sniper System (VSASS) program. Officially adopted and battle-proven by U.S. SOCOM as the Geissele MK1 MOD0 (MRGG-S), the Geissele MRGG MK1 brings this technology to the modern shooter, who demands uncompromising performance and precision.
Built from the ground up, the MRGG MK1 combines Geissele’s patented Phased Array® with Geissele Tri-Port™ Gas System, in-house Match Grade Cold Hammer-Forged Barrel technology, and fully ambidextrous controls to deliver a precision rifle greater than the sum of its parts. Engineered and hand-assembled by Geissele craftsmen for industry-leading accuracy, reliability, and a remarkably smooth shooting experience, it features a proprietary bolt group, and tuned buffer system to reduce felt recoil and enable faster follow-up shots. Whether in the field or on the competition line, the MRGG MK1 excels when every round matters.
- Match Grade Cold Hammer-Forged Barrel – Flawlessly crafted in-house in North Wales, PA, delivering bolt-gun accuracy with gas-gun speed.
- Aluminum Billet Receiver Set – Steel-reinforced cam race and intuitive ambidextrous controls, including a dust-cover-actuated bolt catch and rearward release button for faster, instinctive reloads.
- MRGG SSA-E Two-Stage Trigger – Absolute reliability and precise control in the harshest environments, trusted by professionals in combat and competition.
- Nanoweapon®-Coated Reliability Enhanced BCG – Forged Carpenter 158+ bolt for unmatched durability under high round counts, exclusive to Geissele.
- MK18 Super Modular Rail – Integrated RRS ARCA-Lok bottom rail for modularity and adaptability to meet precision shooter needs.
