Solid plate, better than expected - ADE Advanced Optics RD3-009 1x Reflex Red Dot w/Optic Mounting Plate S&W MP 380 Shield EZ/Standard Picatinny Mounting Plate

I wasn't expecting much considering the price, but I was pleasantly surprised. The machining looks clean, the finish matches the pistol nicely, and the included hardware covered my optic without needing an extra trip to the hardware store.

After zeroing at 15 yards, I fired a couple hundred rounds of mixed FMJ and defensive ammo. The optic stayed put and my zero never shifted. If you're looking for an affordable way to modernize an older Shield EZ, this is a great option.