UTG Pro model 4/AR15 carbine length is a 7" free float quad rail that fits AR rifles. It is compatible with both gas tube and Adams piston systems. It is constructed with solid aircraft aluminum with hard anodizing and precision machine tested for max durability. It's un-impeded top rail platform is consistent with flat top rails. Includes 12 pieces of rail covers.

Features:
Black finish
Slim profile and ultra lightweight design
Complete with universal QD swivel housing
Fits AR rifles