Abstract: A guide for centering transit ammunition rounds generally includes a plate having an ammunition round passage port therethrough along with a plurality of spaced apart ammunition round contact members disposed around a circumference of the passage port. A plurality of moveable arms is provided with each arm supporting a respective member and enabling radial movement of the respective member to and from a passage port center. Each arm engages an adjacent arm preventing non-equidistance spacing of the member from the passage port center and a plurality of biasing elements may be provided and disposed in positions urging a respective arm and member toward the passage port center.

Abstract: Ammunition transfer apparatus for movement of ammunition rounds from a magazine to a gun spaced apart therefrom is provided. The apparatus includes a transfer unit for withdrawing ammunition rounds from the magazine and inserting withdrawn ammunition rounds into the gun and a reciprocating drive, disposed between the magazine and the gun, for alternatively moving the transfer unit into a first position for withdrawing ammunition rounds and a second position for inserting ammunition rounds. In addition a carrier is attached to the reciprocating drive, for causing up to approximately a 180.degree. rotation of the transfer unit between the first and second positions.