Hey all first post lurking on forums for a while but as we all know ar15s have a endless amount of sight and scope options. I bought a open post front sight on amazon that drops in right where the factory front post is. This raises the sight up the right height to be compatible for any ar15 rear BUIS or carry handl. The quality and machining on the piece is excellent it even excepts ar15 sight posts. After that i bought a metal milspec picatinny rail from the same company that is the exact same specs as factory and uses factory hardware to install. once again fit and finish is excellent. I have a ton of ar15 accessories from the 3 rifles i built so i threw on a magpul mbus rear flip sight i had and a thinner front sight post. This set up has the same distance between the front and rear sights so accuracy will stay the same. Now i have a much more adaptable carbine that can be scoped easily and have back up sights in case the optic fails. These sights will co witness perfectly with a red dot too. Obviously this isnt my first choice as a go to war gun but i like all my rifles to be the best they can be and it makes it more fun and easier to run optics. My future plans are a vortex crossfire 1-4x in a burris pepr mount. Now im just running irons because i like them i had a red dot on it but took it off. The front sight and metal rail cost me about 100 but it was well worth it hi point should just do this from the factory or at least have the option id pay the extra cash for it.