M4 QUICK DETACHABLE PLATFORM MODEL: QDM4PS The QDM4PS is an INTERBAR system designed for Colt 723, M4, and 9mm SMG. The IPS bar mounts a quick opening rail grabber for ease of mounting or releasing the shotgun without removing the IPS Rail. Positive lock up on rifle bayonet lug and rifle front hinge pin. Machined from aircraft grade aluminum Allows for quick deployment Rugged construction Hard anodized Made in the U.S.A.