AR15 M4 M16 Spring buffer tube Combination kit
(Red/Blue/Purple/Green/Brown/ Black) 
1* Mil-spec buffer tube

1 *recoil spring

1 *(87g) buffer

1 *standard end plate

1 *castle nut

Features:Backup iron sights can folds and pop up .

Color:Front dot sight and backup rear sight designed in blue/red/black.

Material:Rapid transition sights Made of T6061 aluminium alloy .

Packing included: Front flip up iron sight,Rear flip up iron sight,hex wrench , Front sight adjustment tool .

Packaging that differentiates from other sellers ,Allows you to see our flip up sights more intuitively .

Whether using as main sight or back-up sight , you can count on the accuracy and durability this sight offers.

This flip up iron sight is indispensable accessories when you outdoors, using flip up back up iron sights can make you more handy ,you can go faster close and precision Targets .