Bottom of Dot Sight

To preserve the bottom of your red dot where it gets hit with ejected cases, cut a piece of clear, slick packing tape to size. Clean to bottom of your dot with alcohol  before applying. 

2¢

I had the same idea but I used a piece of Velcro tape, the grippy side but the fuzzy side would work just as well.

Aw, come on boys! Just let em fly until they wear a hole through it. Just think how cool and experienced you’ll look. 
I gave Willie the same advice about his guitar.

JKR

I use 1/8" thick self-adhesive neoprene foam.

Stainless shield. Drilled and mounted to rail. Roddy's idea. Protects full and micros.