MDT's Polymer AICS-style magazines offer lightweight, highly reliable performance. These mags are guaranteed to work in MDT's HNT26, XRS, TAC21, LSS, LSS-XL, HS3, ESS and ACC chassis systems, as well as many other M24 type chassis/bottom metals. These high strength polymer construction also gives these magazines excellent durability. Compatible Cartridges.308 Win/7.62x51 NATO 6.5 Creedmoor6mm Creedmoor22-250 Rem (will work at a reduced capacity).243 Win6mm XC.260 Rem7mm-08 Win MDT 3-Pack .308 Cal 5rd Blk Polymer Magazine Bundle 105026-BLK-MDT-KIT-3X