Was an early adopter of the IR Research version. The IR Research version had several shortcomings. The mount was not up for the task. The software lacked x,y offset display, so was a pain in the ass to sight in - a HUGE pain in the ass. I never bothered to attempt to use it on a clip on as it was not worth using as a scope - and why would I want to magnify a 640x480 display, it looks great as is, but pixelates badly if you magnify it. Then add that the native magnification is barely more than 1x. Then I think there was also an issue with recoil effecting the joystick (I never actually dealt with that one). I retired it to monocular scanning use only after about 1 year.
Now, they did come up with a fix for the mount, but by the time I tried to purchase it, it became impossible to find (outside of purchasing a new M300). I suspect if I researched it, the software issue was fixed - but they did not offer the fix to earlier purchasers. The only way to get that fix is with a warranty repair from what I heard. That only leaves the issues with the native magnification and the battery life.
That said, they do have great looking display.
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I have a 60mm IR Hunter and I am fairly happy with it. Only real issue is it is a tad heavy.
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Per other peoples reply, sounds like they never put the x,y offset on the display. With a digital scope that is bad, with the click-less sight in of the Patrol it is inexcusable. I can sight the IRHunter in with 1 shots. I can waste a box of ammo and not get the Patrol perfect. I went so far to ask them how to sight it in - they said put the gun in a vice, shoot it, then move the crosshairs to the point of impact. That was bullshit. All they needed to do is display the x,y offset in the menu. You could see how much the offset = in mill or MOA, then fiddle to you got the right number. 1 shot sight in - just like every day scope should be.. With a >6K scope I just don’t know what they were thinking.
The M300 is a good monocular. Even owning the IR Hunter, I use the Patrol a LOT more as a monocular. Even if I could have upgraded the scope mount (from the Wilcox mount), the lack of the x,y offset display makes it a marginal scope at best. Plus magnification is nice to have in a scope. Research the ReapIR, I think it is the scope that the M300 should have been.