Primary Arms
SLx RS-10R Review
Primary Arms has come out with their new SLx RS-10R. This is an updated version of the original RS-10 reflex style red dot. One of the big complaints about the original was the mounting footprint it used. Well, the SLx RS-10R has fixed that issue.
As with the original, the SLx RS-10R is packed with features. More important than all of those is the “R” designation at the end of the model number. That “R” stands for RMR. I don't think Primary Arms can say it, but we can. What that means for you is that the RS-10R now uses a RMR footprint. Or a Holosun 407C/507C footprint since they are essentially the same. The only drawback to using the RMR footprint is that the RS-10R now uses the smaller cr1632 battery instead of a cr2032. But through some magic, you still get 25k-50k hours of battery life.
Now back to the rest of the specifications. The RS-10R runs a 3 moa dot. I find the dot size to be a good compromise, no matter if you mount it on a pistol or rifle. It has 11 brightness settings. Of which, the bottom 2 are night vision compatible. To adjust the brightness, the RS-10R has soft touch buttons on the left side. When you reach the highest brightness setting, the dot will flash so you know when the limit has been reached. You also don't have to worry about turning the RS-10R on or off. It uses Primary Arms’ “Autolive” technology. This tech automatically turns the optic off when it is stationary and then on when it senses movement. Worth noting is the RS-10R has 1 moa click adjustments that uses a flathead to adjust. One can even use the rim of a spent case to adjust it, which I have done before. No trying to find the correct allen wrench. These clicks are tiny, but way better than no clicks at all.
Window size in these small red dots can be hard to understand sometimes. Manufactures spec the window size out, but it doesn't take into account if it is rounded or squared. Or where it is rounded and squared. I recommended looking through them to see if you like the window shape. Even though the RS-10R doesn't have a huge window, it is very well shaped to pick up the dot easily. Primary Arms specifies it as 23x19mm. I really like the shape. It is easy for me to see. Other people who I asked about it said the same thing, it's easy to find the dot. Primary Arms also fixed the refresh problem on the RS-10R. The original RS-10 would “galaxy” out because the refresh rate was too slow. The RS-10R does not have this problem. The dot stays consistent when moved and doesn't flash.
The SLx RS-10R uses an aluminum housing. They use 7075 aluminum which is a little stronger than the commonly used 6061. I like how the housing sticks out farther than the lens, giving it a little more protection from drops. One drawback to the RS-10R's construction is the higher deck height of the mounting surface. It sits higher up than some red dots. This doesn't hurt anything, but you do notice it when installing taller iron sights.
I ended up mounting the RS-10R on the Fusion XF-Pro. The XF-Pro uses a mounting plate system. This leads to you noticing the RS-10R’s deck height even more. It didn’t bother anything and I can pick up the dot easily. The dot on the RS-10R is pretty clear, even with my astigmatism. What I really like about the RS-10R, besides being an RMR footprint, is the window. For some reason I just pick the dot up quickly with the way the window is shaped. I am glad Primary Arms updated the RS-10 to an RMR footprint and fixed the refresh problems. It performs great.
I know there are a million reflex pistol red dots on the market now, but the Primary Arms SLx RS-10R is a great option. You get a lifetime warranty. It has a side-loading battery with their “Autolive” on/off function. Plus it now features that RMR footprint everyone was asking for. If you are in the market for a pistol red dot, definitely go check out the new SLx RS-10R.
Firearms Insider Reviews - Key Points
Claim to Fame:
RMR footprint red dot
Target Market:
Anyone wanting a pistol style red dot with a RMR footprint
Features, Benefits, and Specifications of this product:
Battery Life: 25,001 - 50,000 Hours
Battery TypeCR1632 3V Lithium Coin
Side-loading CR1632 battery
Click Value: 1 MOA
Open Emitter
Finish: Hardcoat Anodized
7075 Aluminum construction
Mount Compatibility: Holosun 407C/507C, RMR
Night Vision Compatible
11 Brightness settings
23 x 19mm window
3 MOA Dot
Lifetime Warranty
Weight: 1.1 oz.
What other aesthetic options or finishes are available?
What others are saying?:
Nothing found as of publishing
Link to other reviews:
Price point:
MSRP = $209.00
Retail = Same
I need it now! Availability:
Primary Arms, Midway USA, or your local gun store
Our Rating:
Pros:
RMR / Holosun 507c footprint
Click adjustments
Side loading battery
Autolive
Lifetime warranty
Cons:
Deck height
Score: 8.50 Great
Favorite Link: Fusion XF-Pro Review
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