Thread: Making a magazine, just for the fun of it

I notice your CAD drawing does not make any allowance for correct rim stacking and the consequent forward curvature of magazine to allow for it. You will also need to incorporate a guide rib that follows the rear curvature of the mag to keep the rims 'on track' (as per Bren mags) to prevent rim locking. The follower also needs to be designed to keep even pressure on both the front and rear of the cartridges throughout its travel. If this does not happen then you will get 'nose dive' when the feeding pressure is exerted on the rim as the bolt closes.