45 Degree Offset Back Up Iron Sights - Rapid Transition BUIS by AT3 Tactical

I got a different set of angle irons but they didn't work because of how far the sights came down from the rail on my mck gen2. These sights fit perfect and really don't stick out too much.

The sites are very well-made. The only thing I didn’t care for too much was that the screw that holds them down was a bit large. It should’ve been a little bit smaller.

There are a lot of clones of the Dueck RTS sights on Amazon, with most costing half what these do. I tried a set of those cheaper clones first and I'll save you some trouble, buy these instead. The cheaper clones do not have a proper A2 elevation wheel assembly and instead emulate it in a poor execution where the position of the drum is not user configurable, and they come wrong from the factory. The cheaper ones also were so sloppy in fit and finish that they would not hold zero on a real rifle.This set, however, has everything assembled correctly to make the A2 sight system function like it's supposed to. Unlike other clones, you can use a hidden set screw to independently adjust the elevation wheel in relation to the rear sight height to use different zero schemes. It's a good thing too, because it doesn't come from the factory bottomed out at 6/3 like it's supposed to be and appears to just be randomly done. Overall the sights are well machined, positioned correctly over bore on the 45 degree plane, and have a decent finish to them. The windage knob has firm and audible clicks and were much better than the cheaper set I tried. The tolerances were tight on the rear sight and things were not moving around. I actually trust these to hold zero.It's not all roses, however. The elevation drum on the rear sight has a very weak ball detent and the elevation clicks are barely there. The line marking that should line up with the elevation drum settings is missing even though it is there in product photos. The large rear aperture is drilled dead center instead of offset to account for windage shift when flipping the aperture, unlike the mil-spec A2 sights that account for this shift in the machining. These are made of softer 6061 aluminum instead of the 7075 Dueck Defense uses for the real deal RTS sights.Overall, I'm happy with this purchase. I have more expensive higher quality USA made offsets on my go-to rifle, and I bought these to emulate that on a .22lr AR-15 setup as a trainer. For that use, I'm ok with the weak detents on the elevation drum as I just bottomed it out at 6/3 and will never touch it again. I think these would hold up on a working rifle, but in that use I would send them back for exchange until they gave me a set with a good detent in the wheel. These would be great for a backup gun or just to try out the concept before investing in a more robust setup. Don't be tempted by the myriad of $25 and cheaper sets, get these instead and you'll be happier. These are very well priced for what they are and I suspect AT3 is holding their supplier more accountable for QC than others.

Great quality! Great company! Had cheap flip ups on my AR pistol... put these on instead. Quality made and metal. Fits perfectly with my AT3 Red dot and 3x Magnifier!

Put these on my AR with LPVO, sighted in easily. We’re consistently accurate for about 30 rounds, time will tell if they hold up.

Well made and like them so far. I need two more sets but they don't stay in stock long though.

Work great

Front sight was nice. Rear sight is where they s*** the bed. Rear peep turret was loose enough to seriously alter your zero every time it wiggled around. Also, the close/fine flip-down peep reticle was not on the windage screw straight, crooked in two axis. The windage screw looked like it was installed by a drunk 5-yr old child with a chisel. Totally cammed out and shredded with ragged bare metal visible. I wouldn’t install these sights on a toy gun. Disappointed, but you know how it is with China, you gotta pay extra for a 3rd party to watch ‘em like a hawk and NO PEE BREAKS. Sadly my principles now force me to pay boutique American tacti-cool prices. The search continues.