This is a GG&G, Inc. Sling Mount known as the Front, model GGG-1468.
If your Mossberg 500 shotgun has a removable magazine tube end cap that is not attached to the barrel" you need to purchase one of the GG&G Sling Attachments manufactured for the Mossberg 590 versus one for the Mossberg 500. The Mossberg factory for an unknown reason installed 590 parts on some 500's.
Features:
Installs easily with common hand tools
Accommodates slings with MASH or HK style hooks
Dehorned and smoothed for shooter's safety
