RCM put together an optional Bottom Metal Kit. The finest available without the hassle of piecing things together. We use the Hawkins Precision Remington Type Aluminum Bottom Metal, Wyatt Extended Magazine Box, RCM all machined Aluminum Follower, RCM Follower Spring. Our spring is completely tune able to achieve the amount of tension needed to allow perfect feeding. The follower has transitioning radius’s to allow all cases to align properly in the magazine box.