30-39mm

Leupold BX4 10x32mm Pro Guide HD Binoculars

InfiRay Outdoor Rico GL35 Thermal Sight

AGM Rattler V2 35-640 Thermal Imaging Riflescope

DNT Optics TNC635R ThermNight Digital Thermal and Night Vision Riflescope with Laser Rangefinder

Nocpix LUMI L35R Thermal Monocular with Laser Rangefinder

Sightmark Shade 256 3.5-28×30 Mini Thermal

Vortex Crossfire HD 2-7×32 Riflescope – Illuminated Dead-Hold 2A BDC

Wave Infrared Atris 335 Thermal Imaging Scope

Nocpix Vista H35R Rangefinding Thermal Monocular

Nocpix SLIM L35 Multi-Function Thermal Optic

Nocpix LUMI L35 Compact Thermal Monocular

Leupold Freedom RDS Muzzleloader