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I purchased this for my Echelon 4.0C. While the product advertises a clear dot for those of us with astigmatism, I did still have some of the blotchiness/starburst effect we tend to see with our corrective lenses, although definitely improved/clearer from a Holosun or similar optic in this footprint. I was surprised out of the box how little adjusting I needed to do to zero it in. Less than a magazine at the range and it was pretty much dialed-in (I did use a bore sight at home prior, but most optics take me far longer to get sighted-in than this one did). The box comes with a slew of screws to mount the optic, but I found the ones that came with my Echelon model 1a screws (RMR) fit better than any of these in the Cyelee box. This was a similar trend with my other pistol I put the previously mentioned Cat on. I did see some recommendations online to swap out the included battery with a Duracell though as the one included is not reliable. This was my second Cyelee purchase with the first being a Cat variant of this SRS6 model and if they continue to impress and be reliable, definitely will start to use these on my weapons moving forward.
I've used holosun optics for years and have tried multiple brands but always come back to them. I have never had any issues with any of the pistol optics I've tried. My eyes and astigmatism are worsening with age and my red dots are starting to look like blobs and semicolons. This was my first green dot optic and while the green isn't quite as easy to pick up vs. red against some backgrounds, it's no longer a distorted image for me which is a massive plus.
Compared to other magazine extensions I've used from Pearce this was a bit trickier to install than usual. You almost have to bend the spring sideways to get the new baseplate to fit into the groove in the magazine housing and took me several tries. Feels great in the hand like it was an OEM attachment and cycles FMJ ammo and JHP ammo just fine which I'd expect as I've not had any issues with Pearce magazine grips and extensions in the past.