The 34 mm SIMRAD Cap is an exact reproduction of the night vision integration ring cap used on the USMC M40A3/A5 Scout Sniper Rifle. It is machined from Ordnance Grade Steel and Black Oxide finished.
The ring cap will fit a Badger six-screw 34mm ring, and replaces the cap. This is the most authentic for a M40A3 or M40A5 sniper rifle build, as used by the US Marine Corp. However, the cap will only work with a SIMRAD night vision illuminator, like the PVS-9.