I've got a 6.5 Creedmoor Ruger American Predator w/ AICS compatible stock and bought some mags from Optics Planet. I just read on Magpul's website that older magazines with green followers are not intended for this setup and may not function well. Can anyone tell me when this change took effect and are most mags on retailers shelves affected? I'm hoping I didn't just order $100 in magazines that won't function. Any help would be great, thanks!
From Magpul's site:
The original PMAG 5 7.62 AC magazine, identified by its green lock plate and follower, was optimized for the .308 Winchester based family of cartridges and is compatible with short action AICS-spec bottom metal, to include the Bolt Action Magazine Well for the Hunter 700 Stock, and performed well with most non-.308 based cartridges in nearly all applications. Some three lug bolt action rifle platforms, such as the Ruger American Rifle®, presented some occasional feeding concerns when used with the standard green follower PMAG 5 7.62 AC magazine. We have made an inline change to a new design of spring and follower. The revised PMAG 5 7.62 AC magazine, easily identified with its brown lock plate and follower, has been optimized to ensure complete Magpul reliability with a broad range of calibers in the Ruger American Rifle® and other 3-lug bolt designs, while maintaining or improving the proven Magpul reliability in Remington® 700 footprint platforms and other 2-lug bolt action designs. For the Hunter American stock, we recommend using only the new, brown follower magazines, in calibers like 6.5 Creedmoor. All other actions, and the Ruger in .308, can use either version interchangeably.