not gonna find that bolt at home hardware boys.
send ARMS an email, any time I've needed one I've had to get it directly from them. One of the dealers used to have some ....You could maybe try Armtac , not sure if he was the dealer that stocked the side bolt. Or maybe try Wolverine supplies. But my guess is you will need to get it direct from the manufacturer.
It would have been worth a try. The Gent I got the mount from suggested I call ProMag, and that in his experience they were very helpful. I wouldn't have expected a proprietary fastener, what's unique about it?I don't work on these rifles anymore , nor do I have big huge parts bins to share but I might..... maybe..... have one or two ARMS 18 side bolts here. I will look and if I find them I will post here. If I don't come back and post about finding them..... I didn't find them haha
Cost me 25 bucks




























