Ben GrandBlanc of AR15News.com has his hands on the first versions of the REOS (Rapid Engagement Offset Sight) from Zero Bravo. Not yet released, these sights mount to your optic and are an extremely low profile alternative to common 45-degree canted sights. The REOS has a lower profile the many adjustment turrets.
The REOS is extremely simple using only two circles. This limits long-range practicality, but that is what the primary optic is for. The REOS system is not adjustable outside of rotation on the optic. No pricing or or other release information is available at this time.