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Also replaced is the bolt sleeve lock pin (firing pin guide) which was made to accommodate this different shaped firing pin While the new recall style is similar in lathe turning on the front and back, but in the front midsection it has two flats milled, one on each side. The old replaced style, was totally lathe tuned (round). The difference in the old firing pin and the new one is as follows. The following is Wisner's rendition & info on the subject. If you have any questions concerning this notice, call Winchester Product Service 1-80 or write to Winchester Firing Pin replacement Notice, PO Box 10 Cottage Hills Illinois 62018 Attention Product Service Dept. If other repair or maintenance work is authorized by you to be performed on the firearm when the firing pin is replaced, such work shall be at your cost.” The inspection, replacement/testing and return postage will be accomplished at no cost to you. Your Winchester Model 100 firearm will be inspected, the firing pin replaced and tested and the firearm returned to you. If you own a Winchester Model 100 Rifle or Carbine, please send your firearm to one of the authorized Winchester Model 100 Firing Pin Replacement Centers indicated below. The new firing pins will be available in April 1991. A new firing pin has been designed to replace the firing pin originally made for the Winchester Model 100 Rifle and Carbine. WARNING DO NOT SHOOT YOUR WINCHESTER MODEL 100 RIFLE OR CARBINE. If this occurs, the firearm may fire before the action is locked causing severe damage to the firearm and possibly injury or death to the shooter and bystander. It has come to our attention that the firing pin in the Winchester Model 100 Rifle or Carbine may break due to use and metal fatigue and become lodged in the breech bolt face.
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In July of 1990 the following product safety warning was issued by Winchester. Attention owners of Winchester model 100 rifles and carbines please read this notice. “PRODUCT SAFETY WARNING AND REPLACEMENT NOTICE. WINCHESTER MODEL 100 FIRING PIN RECALL - A notice dated 7-1990 relates the following