BNVD-1531
From Night Vision Wiki
BNVD-1531 is a Dual-tube night vision binocular developed/manufactured by L3 Harris. As you can expect from its name, BNVD-1531 is a combination of PVS-15 and PVS-31. The device utilizes diopter adjustment feature of PVS-15, and lightweight structure of PVS-31.
Internals of BNVD-1531 is very unique. Unlike PVS-31/31A, it doesn't require epoxy to assemble. instead, you just need to screw the objective lens holder onto the pod. ㅤ
