January 10th, 2017, 05:02 PM
Join Date: Jun 2011
I've had no experience with the XM21 receivers so this is more of a question. If you put the Bula receiver in a Sage chassis, you end up with a continuous rail correct? isn't that the same as an AR? If so, couldn't you use AR type BUIS and mount your primary optic using a quick release mount like the Larue or BoBro. This wouldn't give you the ability to use both simultaneously, but would allow back up iron sights.