Magpul MAG335 - QD Swivel Mount for ACS Stock
The ACS QD Swivel Mount can be added to the right or left side of the stock for use with push-button sling swivels. Heavy-duty black phosphatized steel construction easily installs with provided hardware. Swivels not included.
Made in U.S.A.
NOTE: Many makes of push-button QD swivels will make some contact with the ACS's battery tubes. This is considered normal and acts as a 'limited-rotation' feature