Fits .30-06, 6.5x55 Swede, 270 WIN, 280 Rem, 25-06, 35 Whelen calibers; Compatiblity all Med, XM, XM+ chassis/rifles; Nitride steel material; 5 rounds; AICS pattern; Removable floor plate for easy maintenance; Cerakote Elite finish for smooth follower action; Adjustable feedlips for fine-tuned feeding; Unique Double Stack to Single Feed (DSSF) transition design, allowing easier mag changes when shooting prone; MED is short for "Medium" and refers to the length of the rifle action this magazine is compatible with