Description
GrovTec base cup accepts QD sling swivel. The GrovTec base cup can be threaded into the side cup holes on all Luth-AR MBA buttstocks (MBA-1, MBA-2, MBA-3 and MBA-4). Each buttstock has a side cup hole on both sides of the buttstock frame. The cup can be installed with an separately available installation tool or a 1/4″ Allen wrench.