A.R.M.S. #40L-SP Flip Up Rear Sight - Same Plane Dual Aperture
The #40L SP is identical to the #40L but it utilizes our same plane aperture system. This aperture set allows the operator to choose between large and small apertures without worrying about them being zeroed to different ranges.
The Small aperture can also be removed if the user desires the larger CQB aperture only.
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The distinction between inferior quality and premium AR-15 Rear Sight is undeniable. At MSP, we only offer AR 15 Accessories from the most trusted brands like ARMS Sights. Buy with confidence that we stand behind the product we sell.
Customer Ratings & Reviews
Best of the AR-15 Sights out there
Outstanding backup sight. A.R.M.S offers the best AR-15 Sights out there. I used them solely back in the day. I have no difficulty walking into a gunfight with this sight on my weapon. They are strong, durable, and reliable.
Same Plane Aperture flip-up rear AR Sight
This is a quality made AR flip-up rear sight. ARMS designed the 1913 Picatinny rail system that we love today. I got the dual aperture. It is a remarkable primary sight or a back up to optics. I own a few of them, so ARMS & MSP has my business.
Same plane aperture AR Sight
Cheep sights are fine for toys, but if you're putting cheap sights on your range AR, yeah, okay. If you're equipping a serious working tool, this is the AR sight to go with. I have purchased three of the ARMS 40L-SP Flip Up Rear Sights. They are Trustworthy, reliable, repeatable adjustments. Co-witnesses with EoTech 512 no problem. Usually dead on with AR15 front sight right out of the box. Why not start with what you'll end up with anyway? I highly recommend this AR sight.
ARMS Same Plane Dual Aperture Rear Sight
Cheap sights are a false economy; if you're putting cheap sights on a range toy, yeah, okay. If you're equipping a serious working tool, this is the one to go with. A third one of these I've purchased. Robust, reliable, repeatable adjustments. Co-witnesses with EoTech 512 no problem. Usually dead on with AR15/M4 front sight right out of the box. Why not start with what you'll end up with anyway? I highly recommend.