30-39mm

Vortex Crossfire HD 2-7×32 Riflescope – V-Plex Reticles

Athlon Cronus 35P-400 ATS Pro Thermal Imaging Riflescope

Wave Infrared Tempest 335 LRF Thermal Imaging Scope

Pulsar Axion XG30 Compact Thermal Monocular

Nocpix SLIM H35 Multi-Function Thermal Optic

Nocpix LUMI H35 Compact Thermal Monocular

Nocpix ACE L35 Thermal Weapon Sight

DNT Optics TNC335R ThermNight Thermal & Night Vision Multispectral Scope w/ Laser Rangefinder & Ballistic Calculator

DNT Optics HS635 Hydra Multi-Function Thermal Scope

Vortex Strikefire II Bright Red Dot & VMX-3T Magnifier Bundle

Vortex Strikefire II & VMX-3T Magnifier w/ Flip Mount Bundle

Vortex Solo Monocular 10×36 S136