The anti-ICE gunman who killed one person and wounded two others at a Dallas ICE facility appears to have used a variant of a Nazi battle rifle in the attack, multiple firearms experts tell The Post.

Joshua Jahn, 29 , used an antique 8mm Mauser rifle when he opened fire on a bus that was unloading at the federal building, the FBI confirmed on Thursday.

Authorities say he obtained the rifle in August. 11

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The 8mm Mauser is a bolt-action rifle originally developed in Germany in the late 1800s and served as one of the main weapons used by Berlin in both World Wars.

The most famous model is the Karabiner 98K, which was used by Nazi forces and was touted to be the best general-issue rifle in the bloody conflict before semi-automatic weapons dominated the battlefield.

Jahn left b

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