I got this in a package deal. Unknown maker. Staked gas key. No Forward-assist serrations. I didn't see that it doesn't have a notch cut in the bottom. WCS you could machine/cut the notch. I'd just like to get what I paid- $75 Would trade for 308, 556/223, 9mm, 40, 357sig, 357mag/38spec., 762x39, or other AR parts.