Donald W Krolak Deceased1055 Riverwatch Trce, Sparta, TN 38583

4058922, Nov 22, 1977

Sep 26, 1975

5/617203

Ronald E. Elbe - Davenport IA
Donald W. Krolak - Rock Island IL
Philip L. Vernon - Milan IL

The United States of America as represented by the Secretary of the Army - Washington DC

F41C 1100
F41C 2110
F41C 2500

42 16

A conversion system is disclosed for adapting a rifle to fire ammunition of ifferent shape or type than that for which the rifle was designed. The conversion system includes a modified bolt with suitable supports for mounting the same in a rifle receiver in place of the standard rifle bolt. A novel magazine is included for cooperative action with the modified bolt to assure accurate feeding of the different ammunition. Safety features such as prevention of double firing and open bolt retention for inspection after firing the last round is emphasized. Bolt carrier travel on recoil to insure cocking is less than that required to feed the next round into the chamber to prevent double firing. A vertical surface on the bolt engages the rifle's bolt catch to hold the bolt out of battery for visual inspection of the rear of the rifle chamber.

4079535, Mar 21, 1978

Jan 31, 1977

5/763769

Ronald E. Elbe - Davenport IA
Donald W. Krolak - Rock Island IL
Philip L. Vernon - Montpelier IA

The United States of America as represented by the Secretary of the Army - Washington DC

F41C 2502

42 49A

A magazine for a rimfire adapter to feed cartridges into a rifle in which e cartridges are shorter than those for which the rifle was intended. The magazine cavity is positioned rearwardly, in order for the base of the shorter cartridges to be positioned longitudinally in the same position the original cartridge would have been if it were used. This overcomes the double firing safety hazard while suitable ramps and guides are positioned forwardly to guide cartridge travel forward to the chamber.