Like all CASV systems, the CASV-S relies on "piggy-back" mounting to the top of a “flat-top” M4 or M16A4 upper receiver. This chassis features a removable lower handguard, which allows the access of an M203 grenade launcher. The smooth body construction allows multiple rail mounting points, adaptable to any mission needs. Each CASV kit features various length removable rails and mounting hardware.
The CASV-S is the same as the CASV-M, but with a step-down design for the proper co-witnessing of Eotech optics. The CASV-S 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.
Like all CASVs, the CASV-S relies on the use of the Delta Ring for a more secure mounting point. 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.
This CASV chassis is made entirely of aluminum, with the exception of the stainless steel mounting hardware. After mounted, the CASV-S 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-S contains the following Items:
Qty.1 6-inch Accessory Rail
Qty.2 4-inch Accessory Rail
Qty.2 2-inch Accessory Rail
Qty.13 10-32 x ½ Flathead Hex Drive Screw
Qty.2 Hex Wrenches for Mounting Clamp and Accessory Rail Installation.