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NVG Helmet Mount Arm with Dovetail Shoe — Check Helmet Shroud and Device Interface Before Buying
Night vision gear is expensive, and changing the mount is the cheap way to move one tube between helmets — provided the interfaces match. This NVG mount arm is a lightweight push-button release unit with a dovetail shoe, listed for the PVS-14, PVS-31 and GPNVG-18. Three checks decide whether it suits your rig. First the helmet side: your shroud has to present the matching dovetail interface, because a bayonet (horn) shroud will not accept a dovetail arm without an adapter. Second the device side: PVS-14 housings usually leave the factory on a bayonet J-arm, while the PVS-31 and GPNVG-18 use a dovetail shoe, so confirm what your device actually presents. Third the release and the offset: a push-button release makes removal fast, but you still need enough stand-off for correct eye relief. The listing states neither arm length nor weight, so ask the seller if you run a heavy tube or a bump helmet. With 142 sold and a 96.7% positive rating this is a niche part, so measure your current setup before ordering.