The QF B.U.S (Back Up Sight) can be used as both a back up sighting system for rifle optics or as a primary sighting system
The sights must be manually flipped up and are secured using the sight’s internal tensioning feature
A2 front sight post can be adjusted for elevation. And the rear flip sight can also be adjusted for windage
This is a complete sight set
They are made of aluminum and can be mounted to your A3 upper receiver and a free float rail or high rise railed gas block.
I've always wanted a DP-12 from Standard Manufacturing, as it's my dream gun, but decided I'd have to settle for these iron sights for now.
So far they seem very solid and well made, but I have this problem, where when I look through them to aim I just get visions of DP-12's.
Oh well, at least I can take heart knowing that perhaps these sights are made of the same materials the legendary DP-12's are... premium aluminum and metals. I highly recommend these iron sights, especially at this price, although I can't afford a DP-12 at IT'S price. One day, STD MFG...