Daniel Defense just announced an upgrade to their Aimpoint Micro Mount. The original mount was already a simple, effective and durable mount for the Aimpoint Mirco T, H and R optics and the update gives you the option of an absolute co-witness. They didn't mess with anything else.
The mount bolts on to a 1913 rail with a pair of screws. The mount is simple and light since there's no quick-release BS. The $79 mount is made from 6061-T1 aluminum and weighs 1.5oz or 1.8oz with the magnesium lower third co-witness spacer.
The company also released their new KeyMod SLiM Rail, which first debuted in a 15-inch version on the factory built DDM4v11. The SLiM rail is now available for separate purchase in two lengths, 12-inch rifle or 15-inch extended rifle lengths; each retails for $279.