small red dot for 10/22: $100ish, good battery life

[rodinal220]

I know its a little outside your $100 cap but Brownells has free shipping for $49 or more currently. Code M7R

SIG SAUER - ROMEO5 COMPACT RED DOT SIGHT

https://www.brownells.com/optics-mo...s/romeo5-compact-red-dot-sight-prod87941.aspx