I just purchased a V-Match 20" bbl and fired it for the first time last night.
I noticed after about 70-80 rounds, there appeared to be rust forming on the front sight base (milled flat style). The area in question was EXTREMELY hot at this point.
Is this normal? I thought the finish on the bbl was to help prevent this.
Other than that, I love the gun. It looks, sounds, shoots and even smells beautifully!
A very good impression for a first time AR owner!
edited to add the heat comment