Some of our blemished receivers start out as blems out of the forging crates based on dings or imperfections in the forgings. Most imperfections are unnoticeable and NONE affect the functionality. We wanted to have some fun with this run of misfits before they even hit the machines. Located on the right side of the magwell we have engraved all these blems with a Frankenstein logo. This limited run of lowers might be the perfect fix for that spare parts Frankenstein build you've been waiting to start. This lower receiver is marked the same as our standard TM-15 receivers including TM logo, model, serial number, and caliber designation on the right side of the receiver. This receiver is marked Multi Cal. with "VIC" prefix on serial number for Victor Frankenstein. Tactical Machining AR-15 lower receivers are built from mil-spec 7075-T6 forgings from the lead forge in the U.S. They contour is fully machined leaving no flash marks from the forging. We take extra care when machining our lower receivers resulting in tolerances that are tighter and fits that are better than other lower receivers Note: These are considered a firearm and are required by federal law to be shipped to an Federal Firearm License (FFL) holder near you. If you require help finding an FFL holder please do not hesitate to contact us.