The BMG10 was designed from request by the growing user of this unique round. They told us that no more than 10 rounds was needed and preferred a slip top design. Added bullet tip protection for most bullets seated at standard lengths. This is done by holding the rounds at the shoulder. Black.Designed at the request of the growing number of 50 BMG users. They told us they only needed 10 rounds and they preferred a slip top design. We added bullet tip protection for most bullets seated at standard lengths. This is done by holding the rounds at the shoulder.