Features:Holds 20 rounds of 50 BMG or 416 Barrett and other similar sized round in bullet up position.Compact design holds each round by the base in miltary spec foam.Water-resistant O-ring seal for dry storage; Non-submersibleStackable design and double padlock tabbed for securityMax. OAL= 4.9″ – Hole Diameter = .82″Lockable.Carrying handle
Plano Rustrictor Medium Field Ammo Box $21.99 
Berry's Ammo Box #008 - .40 S&W/.45 cal 100/rd Blue/Black $4.29 
MTM 50 BMG Ammo Box 20 Rounds Black
$15.79
