Brass clip from <a href="https://en.wikipedia.org/wiki/Lee_Harvey_Oswald" class="extiw" title="en:Lee Harvey Oswald">Lee Harvey Oswald</a>'s <a href="https://en.wikipedia.org/wiki/Mannlicher-Carcano" class="extiw" title="en:Mannlicher-Carcano">Mannlicher-Carcano</a> rifle, in the collection of the US <a href="https://en.wikipedia.org/wiki/National_Archives_and_Records_Administration" class="extiw" title="en:National Archives and Records Administration">National Archives</a>. Warren Commission Exhibit 575.
US government
<p><a href="//commons.wikimedia.org/wiki/File:Clip_from_the_Mannlicher-Carcano_Rifle_Owned_by_Lee_Harvey_Oswald_-_NARA_-_305153_(page_3).jpg" title="File:Clip from the Mannlicher-Carcano Rifle Owned by Lee Harvey Oswald - NARA - 305153 (page 3).jpg">File:Clip from the Mannlicher-Carcano Rifle Owned by Lee Harvey Oswald - NARA - 305153 (page 3).jpg</a>
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<a href="//commons.wikimedia.org/wiki/File:Clip_from_the_Mannlicher-Carcano_Rifle_Owned_by_Lee_Harvey_Oswald_-_NARA_-_305153_(page_1).jpg" title="File:Clip from the Mannlicher-Carcano Rifle Owned by Lee Harvey Oswald - NARA - 305153 (page 1).jpg">File:Clip from the Mannlicher-Carcano Rifle Owned by Lee Harvey Oswald - NARA - 305153 (page 1).jpg</a>