Thanks for chiming in Jim. I wanted to say the same thing, post pictures, but also wanted to post some pictures of original bolts. I could not find any and no time now to get some good ones so I did not post.Best thing you can do is post a photograph of the bolt in question. Fake A4 bolts are kind of like porn - hard to describe but you know them when you see them.
A square safety lug is a dead giveaway = Fake
A sharp corner at the knuckle where the handle turns down = Fake
The handle just looks too long = Fake
The handle dimensions are "off" = Fake
Originals will have an "R" (Remington) stamped on the bottom of the bolt handle root and usually a punch mark. (Note all the Remington spare parts bolts may have this stamp as well)
Originals will be black oxide finished. Correct rebuilt bolts may be gray parkerized