Had the same switch on my 16... 66/67... When the Green tracers came in...
Sometimes a Cigar is Just a Cigar.....
2019 Tri-Glide.......
I know what you mean, been there done that.
Full auto is an ammo waster... best 3 round bursts to avoid muzzle raising and shooting clouds and running an empty mag in 3 seconds.
wiredgeorge Mico, TX.