UTG ACCU-SYNC Spring Loaded Flip-up Rear Sight

For the money, this is a great sight. The latching mechanism is a little stiff at first, but add a couple drops of oil and it'll wear in nicely. The adjustment clicks and aperture detent are tight and positive.The stacked design saves rail space, but can leave you short on scope clearance with lo-profile rings.Compared to the MBUS, these are quite heavy as they are all metal. Also, unlike the MBUS, they do lock in the raised position, so they won't fold if you run into a solid object. These are so tough, however, any impact hard enough to damage the sights would probably total the gun as well.Overall, pretty happy with the UTG BUS.

Imo, the best flip-up sights on the market. For the price you can't beat. Aluminum material, spring loaded activation button and don't take up much room. If you run a red dot magnifier this is the backup for you.

Contrary to popular belief, UTG makes some damn good sites. I own multiple, and yes, they do primarily cater to the airsoft market, but their products are just as good on live firearms as well. Their 416 M4A1 site is probably one of my favorites! I have it mounted on an 6.8 SPC right now! It holds very well! I unfortunately, could use the 416 solid state site on my new AR, as it features a reflex site unlike my 6.8SPC, which uses a Vortex Strikefire 2, so I bought this site for my Core 15 M4 Tactical, and it works great!UTG sites - for the price, are built with solid quality. I've never once had issues with them loosing zero, I've never had issues with them falling off. They know what they're doing and that's how they dominate the market for those on a budget. Yes, I could've easily bought a Troy, I could've bought a Bravo Company, but the purpose of this site was to be a back-up, and that's exactly what this site fulfills. I zeroed it in 15 rounds, and can effectively engage targets out to 300 yards using a 25 yard zero using 5.56 NATO M855. .223 is a few click down in elevation, but can easily be compensated for with a few turns of the front site.The enthusiasts can say whatever they want, the fact remains, I get the same, if not better performance than they do on a $30 sight, then with their $100+ iron sites. I am very satisfied with my purchase.My only complaint about the product, but I don't see it worth knocking down a star, is if your rifle has the flat site that sites on top of your charging handle (like mine does) than your sites will be pushed forward to occupy 2 rail slots. I don't use magnifiers in this platform, so I'm not really worried about it (it's paired with a Sightmark Ulta Shot Plus) but it would be nice if this site was made to occupy only one rail slot and was able to occupy that space.Thanks UTG for making, what I perceive, as another great addition to my growing collection. Your sites have never once failed me.

They were nice but didn't like the base where they attach, and a little expensive.

These UTG flip up sights are hands down my favorite. Metal construction, spring-loaded, nice finish, good sight picture, and they hold zero.

you better have thumbs of steel with these sights! i thought they were defective at first, nope, just unbelievably stiff. i have huge hands, drive truck for a living, use my hands and fingers more than average joe, and i thought i was going to break skin on my thumb getting these to work. it's a shame too because these fit snug on rail, look cool and seem rugged. maybe they loosen up after a 100 times deploying them, but as backup sights, i aint taking chance. these are going back tomorrow!

These are a great value. Much preferred over M brand

Solid feeling sight. Better than the UTG Pro sights. Slight wobble of a couple degrees when locked in the upright position but the post is under spring tension so the effect on the accuracy is minimal. Seems sturdy enough to take a mild drop or two before breaking. This is definitely not a Chinese made air-soft sight LARPing as a real sight.