Geissele MRGG 6.5 Creedmoor/.308Win 20rd Magazine 05-3049 was built specifically for the Mid-Range Gas Gun program - a magazine engineered to handle large-frame precision cartridges reliably, not adapted from a smaller-frame mag body. The magazine body, floorplate, and square spring are all machined from 410 stainless steel, which holds up better in cold environments than polymer magazines tend to, especially where reliability actually matters in the field. This Geissele MRGG 6.5 magazine carries a black nitride finish over that stainless construction, adding real corrosion resistance without adding bulk. An anti-tilt follower keeps the stack aligned under recoil, and specially designed feed lip geometry presents each round at the optimum angle for feeding. The 6.5 Creedmoor Magazine's geometry is built around the longer overall length of precision cartridges - 6.5 Creedmoor, .308 Winchester, and 6.8x51mm — so it's compatible with any AR-10 platform running these calibers, not just Geissele's own MRGG rifles. Key Features: 20-round capacity 410 stainless steel body, floorplate, and square spring Black nitride finish, corrosion resistant Anti-tilt follower Cartridge-optimized feed lip geometry Compatible with 6.5 Creedmoor, .308 Win, 6.8x51mm Overall length approx. 6.5" Compatible with all AR-10 platforms This Geissele 6.5 Creedmoor magazine gives long-range shooters a metal-body option built specifically for their cartridge's geometry, rather than a general-purpose AR-10 mag pressed into service. Geissele Automatics Geissele MRGG 6.5 Creedmoor/.308Win 20rd Magazine 05-3049