The mk2 35mm was my first trijicon. And yes there is the mk3 and and the REAPv1 and the REAPv2 ... but the mk2 35mm is still a great choice.
The pro of the mk2/mk3 (turret housing units) over the patrol/reap is those turrets. The turrets are MUCH easier to manipulate with gloved hands. Of course if you live in Florida, it might not get cold enough for gloved hands !!
Also, the mk2/mk3 are easier to zero because the turrets give much more positive clicks when dialing your zero.
And the mk2/mk3 have sac (germanium) lens, so less likely to break the main lens if there is an issue. That might only matter if this would be a non-warranty repair.
The XQ50 is a 384 ... and is a decent unit. I've had a pile of pulsars from the XD50a through a thermion XP50. I've recommended them as "best bang for the buck" for several years. BUT, about 2 years ago, their quality really fell off. At first we thought it was "a one off" ... but the number of "one offs" has risen dramatically in the past 2 years ... to the point now where it seems like literally a 50/50 crap shoot that one will have an issue. I can no longer recommend Pulsar
Now if permitted to recommend something else ... If I were buying a dedicated thermal today, it would definitely be a halo.
Why ?
01 - Max
02 - Mil-hash holding reticle
Max, from N-Vision, regularly visits with us here on this forum. He asked for our input. We said "give us a mil-hash holding reticle" ... and OMG ... a few months later, we had one !! Did trijicon every even THINK about visiting with their customers ? Much less listening to their customers ? Or acting on their input ?? N-vision did.
The n-vision units are technically very similar to the trijicons. Same BAE core, same PVS-14 rear end. Different housing. And better quality front lens.
The trijicons all have "hunting" reticles. Good for PBR shots, but not beyond. With the mil-hash holding reticles in the n-vision scopes, you can shoot yotes out to 500yds. If you want to do that, best to get the HALO-LR for more magnification and easier to use reticle. If shooting critters inside 300yds then or mostly inside 200yds ... or mostly inside 100yds .. then the 25mm Halo will be a better and better choice, the further in you are usually shooting because it has more FOV.
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So, the Trijicon mk2/mk3 have the turrets which work better with gloves and are easier to zero. The mk3 has a two latch mount.
The pulsars have quality control issues, I would skip them.
The N-Vision are the class act right now. A leader who visits the front lines and acts ... and a unit with a holding reticle that pushes out how far we can shoot.
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There are a lot of cheap units out there right now. We've seen reports of some of those having QC issues as well. ATN, IRAY, AGM, in my personal experience. So tread carefully if you head to the bargin basement !!