I'm a looking for deals on a few 30 round mags for my 300BLK rifles, I primarily shoot sonic. All my 5.56 are metal. Lancer smoke look like an obvious choice for different look and feel. PA's website says, "NOTE: These magazines are optimized for subsonic 300BLK ammunition which have a wider and more forward-oriented ogive on the projectile. If you are shooting lightweight supersonic 300BLK ammunition (<150gr), we recommend using a standard .223/5.56 magazine, as the geometry of most supersonic cartridges more closely mimics that of a .223/5.56 cartridge." PA has Magpul 300 round 300BLK mags for $11 right now. https://gunmagwarehouse.com/lancer-...ound-advanced-warfighter-magazine.html#92=182 What say ye, and where's today's best deal?