Vltor's CASV is a drop in free float rail system designed to replace the stock plastic handguards. Installation is much faster and easier than a typical free float rail, as the CASV simply mounts on to your flat top upper and is secured in place using the delta ring. Vltor does not recommend the CASV-EL, CASV-M or CASV-S to be used without the standard Delta Ring assembly. The interior diameter is large enough to allow a 1.375" sound suppressor within the handguard. The lower handguard on all CASV systems is removeable to allow for the installation of an M203 grenade launcher.

This CASV chassis is made entirely of aluminum, with the exception of the stainless steel mounting hardware. After mounted, the CASV-M adds less than 1lb (14.3 oz /384g, without mounted rail sections) to the firearm's overall weight. The CASV-S is only available in Black.

The CASV-M is the same as the CASV-EL, but with an enclosed top-end (not cut for a Carbine Length Gas System/Fixed Sight Tower). The CASV-M is intended to be a "drop-on" rail system for a "mid-length" gas system which is equipped with a fixed sight-tower/gas block system. The CASV-M can fit over a carbine length gas system, as long as a "low-profile" gas block is installed.

The smooth body construction allows multiple rail mounting points, adaptable to any mission needs. The CASV-MX does not include a rail package.

Carbine Length CASV-ELS with rail package	(ARR-401)
Mid Length CASV-MX without rail package	(ARR-402)
Mid Length Step-Down CASV-SX without rail package	(ARR-403)
Carbine Length Step-Down CASV-ELSX without rail package	(ARR-404)