MTM’s P-50 series features a flip-top lid and is molded to hold 50 rounds of ammo in a neat 5×10 grid. These ammo boxes have a textured surface for gripping and a grooved lid designed to for easy stacking. Choose from five sizes in multiple colors. Each box is supplied with a load label for at-a-glance organization. Made in the USA. Calibers- OAL 1.30″ 45 ACP, 10mm, 32 NAA, 357 Sig., 38 Casull, 40 S&W, 400 Cor-Bon, 41 Act. Exp., 44 Auto Mag., 45 Auto Rim., 45 GAP, 8mm Nanbu.