This block allows the user to attach any Skeleton stock or AR-15 type stock aswell as Sig type arm braces. (Shown with PAK-AR Fixed and Folded in Demonstrationmock-up).
The OEM sling swivel is simply unscrewed and replaced withthis block and is bolted in place from inside the receiver. You must use a boxend wrench to tighten, not an open end wrench.
