Best thing is that a standard .750 gas block slides right over the 1/2x28 version. Wish they were smooth rather than the 3 rings, but that is nit-picking.
For Motorola Moto E4 / Moto E4 Plus Shockproof Hybrid Hard Slim Phone Case Cover
Oct 18, 2017
Would have prefered a thinner back, thicker edge.
Doubt the phone will ever hit perfectly flat, so thick back does little good.