Aimwin PE320

Enclosed Emitter

Red dot Review

In today's market, there are a bunch of good pistol style red dots. They basically come in two categories: open emitter and closed emitter. Aimwin recently released their PE320. The PE320 is an enclosed emitter red dot with a multi-reticle system and a solar fail safe.

As with any quality red dot, the Aimwin PE320 comes with everything needed. In the box you get the optic, a battery, extra screws (including one for the battery tray), wrenches, cleaning cloth, etc. Probably the most important included item is the Acro to RMR adapter. This gives you the ability to mount it on anything that uses the RMR mounting footprint. There are lots of pistol options using a direct RMR footprint.

Mounting the PE320 is pretty straightforward. However, it does come with two options. If you happen to have something with an ACRO mounting footprint, like a riser or a plate adapter, you can mount the PE320 directly to that. If you have a direct mount RMR cut/footprint, you can use the supplied ACRO to RMR adapter. This is what I did. Just screw down the RMR plate onto your slide and then clamp on the PE320. It's really that easy.

Now that the Aimwin PE320 is mounted, you can take it to the range. To initially turn on the PE320, just click the “+” button. The buttons to control the PE320 are located on the left side of the optic. These are rubberized raised buttons labeled “+” and “-”. They are pretty large and easy to use, even if you are wearing gloves. Of course, tapping on a “+” or “-” button will increase or decrease the brightness of the red dot. There are 11 total brightness settings, the 2 lowest are night vision compatible. Now that the PE320 is on, you can sight it in. A nice feature on the Aimwin is its click adjustable windage and elevation screws. Each click adjusts the point of impact 1 MOA, which is fine for these types of red dots. Now that it is sighted in, and you want to completely turn it off, just hold down the “-” button until the dot disappears.

The PE320 uses Aimwin's “aim awake” feature. The “aim awake” is their auto on/off feature. Once you turn on the PE320 this feature is enabled. Aim Awake works like any of the other auto on/off systems. After the optic sits idle for a short time, the dot will turn off. Once you barely move the optic, the dot will turn back on. The aim awake feature helps with battery life, giving the PE320 around 50,000 hours of run time. I am a huge fan of these auto on/off features.

Aimwin's PE320 is not just a red dot. It features a multi-reticle system. So you get the option of either a circle dot, just a circle, or just a red dot. If using one of the options with the circle, the circle also has little hash marks in it that are located every 90 degrees (similar to an Eotech). To cycle through these 3 reticle options, just hold down the “+” button until it changes. The PE320 uses a 36 MOA circle with a 3 MOA dot, or any combination of the three. I like having reticle options and the PE320's are useful for whatever you need or want.

The multi-reticle system of the PE320 is housed inside a large window. How large is the window? 0.94 inches wide by 0.79 inches high. It's a big window, which is really nice for finding the reticle. However, because of its large window, the PE320 is a little wider than a lot of the enclosed ACRO footprint optics. This isn't bad or good, it really just depends on what trade offs you want.

The last notable feature of the PE320 is the solar panel on top of the optics housing. This solar panel adds a “solar failsafe” to the optic. So if your battery is low, and there is enough light, you will still see the reticle. The Solar Failsafe also works when the battery is completely dead, as long as there is enough light. I tried it with the battery out, and the reticle still comes on under normal room lighting. Don't expect it to work in a dark room without a battery. The Solar Failsafe is a nice option to have, especially if you forget to change the battery out once a year. When you do need to change that battery, the PE320 uses a side mount battery tray for easy use.

I mounted the Aimwin PE320 to a Polymer 80 with a Grey Ghost slide. This particular slide is cut to direct mount an RMR footprint. So I ended up using the PE320’s ACRO to RMR plate. I chose this pistol because I use it in various different forms, one of those is using a Recover Tactical 20/80 brace system. This let me try out the PE320 in a chassis style system and as a standard pistol. I put a ton of rounds through it and even beat the crap out of the PE320. No loss of zero and no other problems, even when using the optic as a slide racker off the benches at the range. With the PE320’s adapter plate, the red dot does sit a little higher up on the pistol, but still below the top of the slide. If you want the PE320 to co-witness with iron sights, you will probably have to get some suppressor height ones. Those still might not be tall enough to clear the PE320’s deck height. Speaking of size, the PE320 is large for a pistol style red dot. Not so much height wise, but more width wise. It definitely is wider than a standard Glock slide. I only see this as a problem if you are carrying it inside the waistband. On a rifle, this could be a bonus. Especially since the window size on the PE320 is fantastic. It made finding the dot real easy. I like the 3 MOA dot size, it is a good compromise between speed and accuracy. Since I live in Oregon, it also rains a lot here. Having an enclosed system also makes it way easier to wipe the rain off of the lenses.

If you are in the market for an enclosed style pistol red dot, the Aimwin PE320 might be worth looking at. It has a decently large window and different reticle options. Being larger in size, it would also make a good rifle dot. If you forget to change your battery, it might still work for you thanks to that solar failsafe. It is also durable and held up to my abuse. So go check it out over at Aimwin.com.

Firearms Insider Reviews - Key Points

Claim to Fame:

Enclosed pistol red dot with large window

Target Market:

Those wanting a large windowed enclosed red dot

Features, Benefits, and Specifications of this product:

Weight: 2.19 ounces (62g)
Dot Size: 3 MOA with 36 MOA ring (selectable)
Window Size: 24.0mm x 20.0mm (0.94" x 0.79")
Dimensions: 45.3mm x 35.0mm x 31.2mm (1.78" x 1.38" x 1.2")
Housing Material: Hard-anodized 6061-T6 Aluminum
Adjustment per Click: 1 MOA
Windage & Elevation Range: ±50 MOA, total range 100 MOA
Footprint: ACRO, RMR adapter plate included
Battery: Side load CR2032
Solar Guard Fail Safe
Battery Life: 50,000 hours (low brightness)
Aim Awake mode
Operating Temperature: -30℃ - 60℃ (-22°F - 140°F)
Brightness Settings: 9 Daylight / 2 Night Vision Levels
Water Resistance: IPX7
Vibration: 2000 G’s

What other aesthetic options or finishes are available?

None

What others are saying?:

5 out of 5 stars on Amazon

Very Nice Enclosed Optic

Just picked this up for my H&K P30L. Had to change the optics plate (Langdon Tactical cut) to an ACRO mount, but it fits perfectly on it and locks down solid. The body appears to be pretty durable and stout without being overly heavy. Controls are nice and large so adjusting brightness and/or choosing dot style is pretty easy. ACRO mounts are probably the easiest installation of any of the footprints since it works like a pic rail. No screws into the plate to worry about getting torqued just right. It does really need a torque spec listed for the clamp screw, though. Never really liked "make it tight, but be careful not to over tighten it" with no spec for what "tight" is. Dots are extremely bright on the max setting and much calmer on the lower settings. Again, it is nice to be able to choose different reticles for different situations. Battery is side loading, which is nice as you don't have to remove the optic for swaps. Only issue I have with the battery compartment is that the tiny screw that holds it in place seems easy to lose as it is not captured. So be careful swapping batteries. We'll see how it does at the range this weekend at holding zero. Adjustments are nice and tactile with just enough resistance to turning to make me think they will stay put pretty good. May wind up being awfully high if you were to use the RMR to ACRO adapter that comes with it on most RMR cut applications. But sits at a nice height on the ACRO specific plate I have installed.

Link to other reviews:

Chris from the 740 on YouTube

Price point:

MSRP = $359.95

Retail = $240

I need it now! Availability:

Aimwin Optics or Amazon

Our Rating:

Pros:

Multi reticle
Solar fail safe
Large window size
Acro footprint w/RMR plate
Auto on/off (Aim Awake)

Cons:

Optic is physically wider
Deck height is pretty tall

Score: 8.00 Great

Favorite Link: Grey Ghost Glock Slide Review

The enclosed emitter, red dot sight market, is getting packed with options. One of those options is the Viridian RFX45. Because it is from Viridian, it uses a green dot, not red, as green is what Viridian is known for. The RFX45 is mainly designed for pistols, but can be used on rifles. I’m mainly going to focus on it as a pistol optic.

As mentioned, the RFX45 is a closed emitter dot style sight. Some people have nicknamed them “mailbox” sights, since they look like a mailbox sitting on top of your pistol. This is due to the square, boxy shape of the sight. The closed emitter sight has some distinct advantages over the open emitter style. For instance, the RFX45’s emitter won’t get dust or moisture on it. So the image of the dot stays clear. Yes, dust and moisture can get on the outside lenses, but this doesn’t affect the emitter itself and is easily cleaned off. I find enclosed style dot sights are easier for me to find the dot. This is due to it being easier to look down a tube, since my eyes find the center of a tube naturally. I know the RFX45 is technically a rectangle, but it still works better for me. To me there are only two disadvantages, and they really are small ones. Enclosed style sights, like the RFX45, can weigh more than open emitter style. The RFX45 only weighs around ¾ oz more than most open reflex sights. The RFX45 is still light enough that, most likely, you won’t have to change recoil springs, I didn’t. The next disadvantage could be their size. You might be more likely to hit it on something. Or, it might be harder to conceal under a shirt. Other than that, mailbox style sights, like the RFX45, are a great sight option.

Most of the closed emitter sights you encounter will have the ACRO footprint, the Viridian RFX45 is no different. The ACRO style footprint is a little unique, in that it is kind of like a mini picatinny rail. This means that you will need an adapter if your slide is not specifically cut for an ACRO. Do not fear, Viridian has different options as to what adapter plate the RFX45 comes with. Either a MOS, RMR, DOCTOR, or a low or high mount. The high mount is to mount it on an AR style rifle. The RFX45 I was sent had the MOS adaptor as the RMR ones were not out yet. I used a Primary Machine plate and it worked just fine. I do like how Viridian uses an “Industry Standard'' mounting platform for the RFX45.

Bottom dot is from the fiber optic front sight.

The Viridian RFX45 is packed with useful features. First, the RFX45 has Instant-On. So whenever the sight senses motion, it turns the green dot on. If it sits for 2 minutes, the dot goes off until it senses movement again. This feature worked flawlessly in the RFX45. I had zero problems with it. Next up is the 50,000 hr battery life. This long battery life is also attributed to the Instant-On capability and its CR2032 battery. The green dot size is listed as 5 MOA which is slightly larger than some others. Since this is a green dot, the 5 MOA dot appeared to be slightly smaller to me. But either way, the 5 MOA dot size worked fine for everything I did with it. The RFX45 has 10 brightness settings, 2 of which are night vision compatible. At the highest setting, the RFX45 can be seen in direct bright sunlight. During my shooting experiences, some in bright sunlight, I could see the green dot just fine.

Window size can play an important role when choosing an enclosed red dot/green dot sight. The Viridian RFX45 has a 24mm wide x 15.5mm tall window size. This window size is wider than most of its competition. Most are 15mmx15mm. As mentioned previously, this window size makes the sight super easy for me to pick up. This includes under recoil, the draw stroke, and transitioning between target to target. The clear green dot probably helps a little with that too. All I can say is that I pick up the RFX45’s dot faster than my open reflex sights.

Being the RFX45 is one of those mailbox style sights, I better explain some about its style. Yes, it’s square. But more on point is that the battery is housed at the top of the optic. So no removing the sight to change the battery. On the left side is a rubber pad with the up/down brightness buttons. The glass has an ever so slight tint to it. I never even noticed the tint, even on darker days. It’s super clear. Speaking of clear, the dot is extremely clear also. I have an astigmatism, and the dot doesn’t star out as much as some of my other green dots. For those of you with normal eyes, you will get a super clear round dot. I mounted the RFX45 to a Grey Ghost Precision slide that was cut for an RMR. Even with an adapter plate, the RFX45 sits level with the top of my slide. This allows me to still use the tall iron sights that are on the pistol.

So, if you are in the market for a “mailbox” style sight, do take a look into the Viridian RFX45. It may cost a little bit more than some others, but you are getting a quality enclosed green dot sight. I used it quite a bit and it never failed me, something I can’t say about the ammo I was using. You get a lot of high end features in the RFX45. You can check it out at Viridianweapontech.com