TROY INDUSTRIES DROP-IN BATTLERAIL - CHARLIE RAIL SYSTEM•Two-piece drop-in rail system free floats the barrel for improved accuracy •Requires no gunsmithing to install •Features (2) built-in QD swivel mounts •Installs in mins •Offers an extended forearm while allowing the user to keep the existing fixed front sight •Built off rock solid rotary clamping system & does not require removal of delta ring barrel nut or the fixed front sight •CHARLIE rail system features (4) full-length picatinny rails w/an extended tube past the fixed front sight •Made in the USA •Black Size12.0"