BC from United States, AZ Public Profile

Won't be able to install/test for a while (still need to buy the FCU) but seems very high quality, as expected for GGP. Black multi-cam color (OP exclusive) looks awesome!.

Seems to line up with my Icarus X-Compact frame. All the P320 options was confusing and hard to get clear confirmation on what would/would not work. Supposedly this slide WON'T fit X-Compact, but just setting slide on frame, it looks like it may BARELY cover the gap under the guide rod, but I'll have to get it put together to know if i need to offload this frame for a compact.

I wanted a 1x optic for most of the shooting I do with my AR, but wanted the option of slight magnification for the longer range shooting I do when out plinking. A flip-to-side red dot magnifier seemed like a good option, but didn't want to fork out the cash on a Eotech or Aimpoint. A couple buddies of mine have Primary Arms optics and have nothing but good things to say about them, so I was leaning toward this one. Looks were also important, and this was one of the better-looking magnifiers out there in my price range.

I combined this with the GG&G flip-to-side mount, and it mounts up with just enough space behind my Aimpoint Micro-style red dot (again, don't want to spend as much on my optic system as I did the rest of the rifle, combined). It's pretty clear and is as expected from the reviews I read about it. It is a little bulkier than I'd like but, from what I read (I don't have an Eotech, myeslf), is only slightly larger than an Eotech magnifier.

I bought the HS403A for the slightly smaller profile when looking down the optic as compared to the HS403GL, but exchanged it for the GL after seeing the batter cover in person. Basically, the battery on the HS403A goes between the red dot and the mount, under a rubber flap that you lift up, then essentially an electrode that you slide the battery under. So the battery is sandwiched between the negative electrode on the optic side, and the positive electrode/terminal and rubber flap on the other, and the whole thing is screwed onto the mount which pressed the rubber flap against the optic and (hopefully) creates a water-tight seal. That is, the rubber cover/flap does not lock into place, itself, but relies on the red dot being securely tightened to the mount for a water-tight seal. That was just a little too unnerving for me. I'll admit that I don't expect my rifle to ever be submerged and I don't think it would ever be a risk of water entering the battery compartment, even if it was rained on.

I'm VERY happy with the HS403GL. It's compact, seems to hold zero pretty well (I've only shot it a couple times, but haven't noticed any drift in the point of contact relative to the red dot yet), and looks pretty cool. As others have said, the dot isn't crisp, but that doesn't bother me for my purposes. I don't actually shoot much so am not the best shot, but I had decent groupings (didn't think to measure) at 50 yards.

I had both red dots briefly so was able to compare them side by