Can't recommend them enough - Primary Arms SLx 5X Micro Prismatic Red Dot Sight

This is my 4th PA prism & i still have the first on a 10.5 mock18 build. I personally prefer them over red dots since if they run out of battery they are still an etched reticle. I've never had a problem mounting, zeroing or using any prism from primary arms.

The mounting hardware included is probably good enough for most people & use cases but I've had the best results upgrading to ADM mounts 1.93 & 1.93 spacers on the standard mount if you don't need QD.

Paired this with a top mounted scs 320 for a cheap "acog combo". This has been the lightest 1X-5X i have been able to research. Highly recommend if you need a 5X optic.