This bullet was designed specifically for the AR style rifles and will fit in standard 10 or 30 round magazines. Our MTAC line is machined out of lead free solid copper bar stock on a CNC swiss lathe. These are a high BC solid bullet designed exclusively for target use at all ranges. A unique feature of this bullet is our patented SealTite band which is a band slightly larger than caliber diameter around the bullet which was designed to eliminate fliers by preventing gas blow-by. The SealTite band also decreases copper fouling which is typically associated with mono metal bullets.