This is a GG&G, Inc. Mount known as the Flashlight Mount, model GGG-1622.
GG&G's Mossberg 930 Sling and Flashlight Combo Mount provides an easy way to mount a tactical flashlight without interfering with the front sling attachment point due to its unique design. The accessory rail dovetail is manufactured per MIL-STD-1913 and the looped sling attachment accepts HK or MASH style hook sling attachments This combo mount is also ambidextrous; the accessory rail will point rearward for right handed shooters and will point forward for left handed shooters. Manufactured from bullet proof AS-35 Geneva steel and 6061-T6 billet aluminum. All edges have been rounded and smoothed for shooter's safety. The GG&G Mossberg 930 Sling and Flashlight Combo Mount is perfect for mounting a tactical flashlight and sling to your Mossberg 930.
Features:
MIL-STD-1913 accessory rail
Ambidextrous
Accessory Rail measures 1 3/4 long;Fits Mossberg 930 shotgun with large diameter barrels (9.25)
