I think Bushy puts those on the California special top loading rifles.
Here: Part number AZC-15120
http://www.bushmaster.com/products.asp?cat=501
My new Dlask lower has an extremely tight fit with my upper. I want some kind of extended pin to aid in removing it without having to use a tool.
Eject mag, strip one round, push pin with tip. No tools.
it looks like molded plastic and somthin is odd with the ejection port.. real houge grip tho![]()