Tag Archives: sights

FAB Defense KPOS G2 Follow-Up Thoughts

I’ve been shooting the FAB Defense KPOS G2 a little further on my Glock 17 lately, and I have some follow-up thoughts and findings.

First: it’s not compatible with iron sights that go forward of the rear sight cut, to include many, many of the fiber optic sights out there such as the Tru-Glo TFX. I have not tried it with suppressor sights.

Second: I tried using my Tactical Solutions TSG-22 22lr conversion with it. The conversion sits slide sits low enough that I would be VERY concerned about striking the “compensator shroud”. You could, in theory, remove the shroud to make it work correctly, which might be a viable alternative in some setups. The charging handle mechanism is also a little suspect with it, but it does seem to work. I might experiment with this more later on if I have time.

Third: an extended magazine release helps a lot with this setup. I highly recommend one.

Fourth: it seems like your gun gets very dirty VERY quickly in this enclosure. My front night sight was blacked out after a few magazines of shooting..

Finally: I am still concerned about this gun’s ability to retain a true zero due to the slight up-down movement that you can get with the flexing of the frame. My groups are larger than I would have expected, albeit this is when shooting at 25yds with trash ammo. Now, the truth is, since the front of the gun is latched in pretty good, it might look worse than it is, since the back is going to show a larger flexing due to variance. Still, it’s not what i would call a precision weapon compared to a “real” rifle. It does seem to more-or-less hold zero between taking the gun in and out of the chassis, though.

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FAB Defense FBS / RBS Backup Sights

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Backup sights are a controversial issue these days. There are an increasing number of shooters who feel that the current crop of military-grade reflex and prism sights (Aimpoints, Trijicon ACOGs, etc.) are tough enough and reliable enough that backup sights are no longer useful – that is to say, any event that’s traumatic enough to destroy an ACOG is probably not going to leave behind an intact rifle.

To my knowledge, most militaries still embrace backup sights as an essential. About the only first-rate military I’ve ever seen field optics without backup iron sights is the IDF – you can find plenty of pictures online of optics deployed on flat-top M16s without a rear backup sight..

Therefore, I assume FAB Defense developed the FBS / RBS backup sights for export. I have a 9mm AR-15 that needed some backup sights, and the FBS / RBS seemed like an interesting option. How did I like it? More after the break.

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A New Sight Option for the KPOS G2

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One of my key criticisms of the KPOS Glock chassis platform is that it does best with low profile sights, yet there were no good options for those sorts of sights on the market.

Well, it turns out that there is an option now, courtesy of our friends at CZ-USA: the Scorpion EVO 3 LPA iron sights. I was skeptical at first, but saw these sights on European Scorpion EVOs. The sights are made by LPA in Italy (ie, they are high quality), they’re fully adjustable, they mount on standard Picatinny rails, and best of all, they’re only $30 right now. They do lower 1/4 co-witness with my Holosun HS403C on KZ QD mount, which is perfect for fixed sights.

I highly recommend them!