Smears of blood were seen on the assault rifle Shane Tamura used during his deadly rampage inside 345 Park Avenue on Monday night, according to a photo obtained by The Post.
The rifle is a Palmetto State Armory AR-15 assault rifle in .223-caliber.
Gun retails for about $420.
The 27-year-old from Las Vegas killed an NYPD cop and at least four others, and injured several others.
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