We have very affordable and dependable AR15 Backup Rear Sights for sale. This is an A2 Style Adjustable Iron Sight for AR-15 M4 Flattop Rifle. This NcStar MARDRS is compact enough that it does not take up much of your Picatinny rail space. You can have a backup rear sight ready to go at the moment's notice and still have space for a reflex, red-dot or holographic optic on your AR15 upper receiver.
AR-15 Adjustable Rear Sight
This AR-15 Back-Up Rear Sight should fit all AR15, M4 and M16 flattop picatinny rail upper receivers. It is fully adjustable for elevation and windage with knurled click adjustable controls. We also have M-16/AR-15 Flip Up Rear Sight if you are looking for another type of AR15 Backup Iron Sight.
If you need a tool to sight your AR-15 Rifles, we have AR15 front sight adjustment tools for sale.