Tag: corrosion

Because I was sent a few different handguards by Rainier Arms recently, I needed to disassemble and reassemble a few upper receiver assemblies. One of those was the 5.45x39 upper sent to me by Spike's Tactical last year. It's seen crate after crate of corrosive surplus ammunition, and has never been properly cleaned. Coincidentally, I had just received a CAT M4 bolt scraper tool from Rainier, and thought I'd see how much carbon it would remove - there will be a separate post on that. But the topic of this… Read More