| CPC F41A 3/66 (2013.01) | 13 Claims |

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1. A case to be placed between a bolt/slide and a gun body/frame in hand guns, wherein the case comprises:
a uniform body made of polymer;
a rear support embedded within said uniform body and made of metal;
a rear bolt guide which is provided integrally with said rear support and extends outward from the uniform body;
a front support embedded within said uniform body and made of metal; and
a rear bolt/slide guide which is provided integrally with said front support and extends outward from the uniform body.
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