What AR back up sights do you use?

[PewPewPewCo]

I keep my backup and primary in the same system:

it's called "A1 upper and front sight post"

man I want to build an A1 receiver, with A2 stock, fixed front sight post, and a 10.5" barrel build so bad

 

[boss_hawg]

man I want to build an A1 receiver, with A2 stock, fixed front sight post, and a 10.5" barrel build so bad

I want to build one of these too but I would substitute the a2 stock for a CAR fiberlite with a two position buffer tube.

I've been spending a lot of time on the nodak spud page and the retro shit calls to me.