Check the listing for details. MTM 100 Round Flip-Top Ammo Box 38/357 Cal (Clear Red). Condition: New. Listed at 7.40 USD. Ideal for storing reloads. They have an easy to grip, scuff-resistant textured surface and are stackable. MTM originated the 100 round flip-top handgun ammo boxes over 30 years ago. The Case-Gard P-100�s are the perfect ammo carrier for the handgunner who wants to spend several hours at the range.