Known Compatibility Issues:
LaRue Tactical has a larger than mil-spec buffer extension in the lower receiver that interferes with the ARC Stock rails when attempting to collapse the stock.
CMT Tactical UHP15 has a larger than mil-spec buffer extension in the lower receiver that interferes with the ARC Stock rails when attempting to collapse the stock.
San Tan Tactical has built in quick disconnect sling attachment points just behind the takedown pin which block movement of the ARC Stock rails.
LWRC ambidextrous lower has the right side bolt catch located in a position that prevents the ARC Stock from reaching its collapsed position. Modified version available at http://store.avguns.com/mvb-industries-arc-collapsable-pdw-stock/
Spike’s Tactical ambidextrous billet lower has a right side bolt release lever that extends rearward far enough to prevent the ARC Stock from reaching its collapsed position.
