Geissele MRGG 6.5 Creedmoor 20" Bbl DDC Rifle 08-529S

Geissele MRGG 6.5 Creedmoor 20" DDC Rifle 08-529S traces its lineage straight back to a SOCOM program — this is the civilian version of the Geissele MK1 MOD0, adopted and battle-proven as part of the Very Long-Range Semi-Automatic Sniper System requirement. That's not marketing lineage, that's the actual origin.

This MRGG 6.5 Creedmoor build runs a 20" cold hammer forged, chrome-lined barrel with a 1:7.5 twist, cut for 6.5 Creedmoor's flat-trajectory ballistics at extended range. Geissele's patented Phased Array® gas system paired with Tri-Port™ metering runs through a Strato gas block with an .812 journal, keeping recoil impulse and follow-up shot timing consistent even as the barrel heats up over a long string. Billet upper and lower receivers, Type III hardcoat anodized, give the whole platform the rigidity match-grade accuracy actually depends on.

The Geissele 6.5 Creedmoor platform's MK18 rail runs 17.5" with an integrated ARCA-Lok bottom rail, useful for bipod and tripod mounting on precision setups. Inside, the Nanoweapon®-coated Reliability Enhanced BCG runs a forged Carpenter 158+ bolt, and the SSA-E two-stage trigger delivers the kind of clean, repeatable break long-range shooting actually rewards. A Magpul PRS Lite stock, flared magwell, and oversized trigger guard round out the ergonomics.

Key Features:

• 20" cold hammer forged, chrome-lined CRMOV barrel, 1:7.5 twist
• Phased Array® gas system w/ Tri-Port™ metering, Strato gas block
• Fully ambidextrous charging handle, bolt catch/release, magazine release, safety
• Nanoweapon®-coated Reliability Enhanced BCG, Carpenter 158+ bolt
• SSA-E two-stage trigger
• MK18 17.5" rail w/ integrated ARCA-Lok bottom rail
• Magpul PRS Lite adjustable stock
• Approx. 10.8 lbs, DDC finish

This Geissele MRGG hands precision shooters the same rifle SOCOM tested at .58 MOA average across ten units — no compromise between duty-grade durability and match-grade accuracy.