Hawke AIRMAX 4-12x50 AO AMX has a monolithic aluminium construction filled with nitrogen. The tube has a diameter of one inch, i.e. 25.4mm.
The eyepiece has fast focusing (Fast Focus) and the lenses are equipped with a sixteen-layer MC coating. The gas inside the system ensures that the objective and eyepiece lenses do not fog up. The riflescope is also waterproof and shockproof. Inside the AIRMAX models there is a etched AMX reticle AMX
Horizontal and vertical adjustment is in Minute Of Angle – one click equals ¼ MOA. The turrets for adjustment have a low profile and are capped, so the set values will not change without the user's knowledge. Parallax correction is handled via an adjustment ring behind the objective; its range is from 10 yds to infinity. Variable magnification ranges from 4-12x; the riflescope is in the second focal plane.