Our take: This full metal SRC Flip-Up CQB M16/ M4 rear iron sight can be easily attached to most 20mm rail system, and lines up perfectly with standard M16/ M4 front sights.  This SRC Rear Iron Sight instantly flips up and into position with the push of a button, and just as easily folds flat when you want to use an accessory optic.  Constructed entirely from high grade metal, this iron sight can easily withstand the rigors of intense airsoft combat.  This Flip-Up CQB Rear Iron Sight is a great replacement for standard M4/ M16 rear iron sights, and increases space on the upper receiver rail for mounting accessory optics.  Easy to install and durably built, this SRC Flip-Up CQB rear iron sight is a perfect addition to your M4/ M16 Airsoft AEG!

Features:
- Crafted from durable and high grade metal
- Push button flip-up feature
- Locks into place when flipped up
- Easy to install
- Adjustable for windage
- Features a Long Range and Close Quarters aperture
- Ready to use right out of the box
- Precision machined

Package weight: 1.25 lb