Not a quality fit. - UTG Pro AR-15 Carbine Length Super Slim M-LOK Drop-in Rail

Put this on a carbine DPMS with not much difficulty, looks great. But...where the two pieces come together there is a bigger gap towards the front than the rear although the screw holes lining up perfectly. Tightened as much as I can, unfortunately the whole front can shift upwards more than slightly. So this means no optic or lazer will hold zero, a flashlight should be no big deal. Previous after market quad-rail fit perfect, wanted something slimmer and lighter.