Nikon m-223m 4-16x42mm - Nikon M-223 4-16x42mm Rifle Scope - Long Range Waterproof Hunting Scope

I bought this scope to use for long range target shooting and the occasional hunt. I use this scope weekly shooting out to 500yards and sometimes 600. I currently have 757 rounds on it. It is mounted it an AR-15 set up to shoot long range.
Pros; For the price the scope has a lot going for it. The glass is extremely clear, even in low light. The Adjustments track perfectly with no back lash or sticking; Every range trip I constantly dial between 300 and 500+ yards with no issues, the adjustment end up exactly right every time. The scope holds zero perfectly. Ive even dropped it (accidently) onto cement from about a foot; it landed on the parallax knob, but did not affect its zero. The parallax knob works just fine. Eye relief is perfectly constant across all magnification ranges. The turrets have a very loud and tactile click. The tool less snap feature that is used to return turrets to zero after the scope has been zeroed to the rifle is fantastic.
Cons; Twice Ive had the turrets move on me without my knowing. I dont know if my hand bumped it or if it snagged my clothing, but the elevation turret was off almost 2 minutes. This surprised me because the turrets click very positively and have little if anything to snag on. So far this is the only problem I have had with this scope.

This review was written in the old system and had content requirements that are different than reviews written today.