| CPC F41A 21/48 (2013.01) [F41C 23/16 (2013.01)] | 30 Claims | 

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               1. In a rifle having a receiver assembly comprising an upper receiver assembly including an upper receiver and action components and a barrel having a barrel forend, and a lower receiver assembly that includes a lower receiver and fire controls, the lower receiver including a magazine well and a trigger guard forming a loop disposed behind the magazine well, the improvement comprising: a conversion adapter comprising a removable mount piece that is removably securable to the magazine well, wherein when said mount piece is connected to said lower receiver the mount piece does not contact the upper receiver, wherein the mount piece comprises an accessory connector that is configured to releasably connect with one or more accessories to mount the one or more accessories to the rifle via the accessory connector, wherein said accessory connector provides a point of connection for connecting said one or more accessories to the rifle, and wherein said point of connection is located in front of the magazine well; 
            wherein the mount piece, when attached to the rifle, engages multiple surfaces of the lower receiver, including surfaces of the magazine well; and 
                wherein the mount piece is removably securable to the magazine well and includes a mounting connector that is disposed in the loop. 
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