Installation Instructions for the Vltor CASV Handguard
Model # CASV Series Handguards.
Congratulations on the purchase of your Vltor CASV handguard. The CASV system was developed in close support with the U.S. Navy. Before a single until was released to the civilian market, the CASV
was officially deemed "Battle Proven".
Before attempting installation, please read the warnings and notes first.
WARNING: The Installation of the any Vltor firearm component should be preformed by a qualified gunsmith or qualified United States military small arms technician.
A note to qualified installers: Refer to the current United States Military Technical Manuals or Colt factory technical manuals for proper tool needs and technical data, such as, torque specifications. All parts installed during the conversion, including Vltor Modstock components, should be new and certified by Colt and/or the United States Military.
CASV kit contains the following components:
- Qty.1 Upper Handguard Assembly
- Qty.1 Lower Handguard Assembly
- Qty.1 Upper Handguard Rail Clamp
- Qty.2 Upper Handguard Rail Clamp Screws
- Qty.1 6-inch Accessory Rail
- Qty.2 4-inch Accessory Rail
- Qty.2 2-inch Accessory Rail
- Qty.11 10-32 x ½ Flathead Hex Drive Screw
- Qty.2 Hex Wrenches for Mounting Clamp and Accessory Rail Installation.
Make sure the weapon is unloaded, with a cleared chamber.
Remove the existing factory handguard (by pulling back the delta ring and removing the upper and lower handguard halves).
Special Note: AR15 carbine variations are equipped with a factory installed sling loop (mounted to the sight-tower/gas block assembly). For the CASV Handguard to work safely and reliably, this sling loop needs to be removed. To remove the sling loop, the sling mounting rivet needs to be removed. Please have a qualified gunsmith perform this task.
Take the new CASV and remove the lower handguard and rail mounting clamp (secured by two mounting screws). To unlock the lower handguard, apply pressure to the two locking tab, which protrudes from the upper forward portion of the upper handguard. With pressure applied, force the tabs down ward through the locking slots. With the lower handguard unlocked, the handguard will now rotate and come free from the upper handguard assembly. After a certain amount of rotation, the lower handguard will easily come free from the rear mounting position.
By applying pressure to the delta ring (rearward) allowing access to the exposed barrel nut teeth. With the barrel nut teeth exposed,
install the top handguard assembly downward, on top of the barrel nut and receiver flattop. If you look closely, there’s a mating area within the handguard, which interfaces with the barrel nut teeth. You will know when the handguard is properly installed when the delta ring snaps over the rear portion of the handguard, also when handguards rail is flush with the upper receiver flat-top rail.
Next step is to install the rear mounting clamp. With the clamp held in place, install the two clamping screws, which interlock the handguard to the upper receiver groves. With the two screws installed and hand tightened, take the properly sized Allen wrench (equipped with the kit) and
evenly tighten the screws to a strong and snug fit. When tightening the screws, make sure not to over tighten them or damage to the screw may occur.
Now with the upper handguard is mounted and secured, the lower handguard can be installed. Installation starts by
installing the hooked tabs around the pivoting shafts located within the rear portion of the upper handguard. With the rear part of the handguard installed, pivot the forward portion until the
locking tabs contact the upper handguard. You may need to apply pressure to the locking tabs, assisting the tabs through the upper receiver, to the locking position.
Accessory Rails. The five rails, which come standard in your kit, can be assembled anywhere a mounting hole (Locking press nut) is located. One can place the rail(s) on the 3, 6 and 9 o’clock positions, including the two lower 45 degree positions. When installing, we recommend that the user applies a small amount of grease/lubricant to the screws mating surface. This will allow for easy disassembly later. We also recommend that the installer does not over tighten the
accessory mounting screws or damage may occur.
If you encounter any difficulties operating the CASV handguard, or if your qualified gunsmith/technician has questions regarding installation of the CASV Handguard, feel free to contact Vltor Service Department, either by telephone: (520) 408-1944 or by email:
Modular Firearm Buttstock - Patent 6925744.
Other Vltor patents are
Copyright 2002 - 2008 VLTOR Weapon Systems
All Vltor logos are registered Trademarks.