Need an AR15 answer
I just received a gift of a .223 Panther AR15 rifle, new to a guy who has a 55 year history of revolvers and bolt-actions. I sent an e-mail to Panther, but failing a response, I'll ask here:
There is a spring-loaded button on the right side of the receiver, angled toward, but below, the bolt mechanism. No where in the instruction book is any mention of its function. What is it for?