![KFA_2025_Classic Logo_Red [HIREZ-FINAL01]](https://kfarmory.com/wp-content/uploads/2025/06/KFA_2025_Classic-Logo_Red-HIREZ-FINAL01-1-scaled.png#117002){kind=logo}
Knight’s Armament Company RAS M-4 Carbine Rail Adapter System With Three 11 Rib Panels
M4 Carbine RAS, 5.56mm, with three 11-rib panels The KAC M4 RAS (Rail Adapter System) was developed for use on the US military’s M4 Carbine, and with over 1 million rails issued to date, it is one of the most battle proven designs available for the AR-15 platform. This non-free float handguard is a simple-to-install, drop-in upgrade that features genuine Mil-Spec M1913 Picatinny Rails along its entire length. What sets the M4 RAS apart from other 2-piece quad rails on the market is that it securely locks to the rifle’s barrel nut via a clamp and screw arrangement, making it a very solid foundation upon which to mount tactical accessories. Includes three KAC 11 Rib Rail Panels. For other rib panel lengths and colors, click here Rifle Requirements: The M4 RAS is a drop-in replacement part for standard, 2-piece polymer, M4-type handguards. The rifle must have a carbine length gas system, delta ring assembly, fixed front sight/gas block, and round handguard end cap. Lighter barrel profiles work best (M4 or Government contours). Heavier barrel contours may require modification to the inside of the rail. For AR-15/SR-15 based platforms only; not compatible with SR-25 variants. Installation instructions are included. Specifications: Weight: 8.9oz Length: 6.25? Free Float: No Material: Aluminum Finish: Black Anodizing
Out of stock
Email when stock available
| Weight | 2 lbs |
|---|---|
| Dimensions | 9 × 4 × 4 in |
| UPC | 819064010340 |
| Brand | Knight's Armament Company |
Related products
-
KAC 7.62mm QDC 3-Prong FH Kit
$229.43The KAC 7.62mm QDC Suppressor Compatible 3- Prong Flash Hider. Caliber Up to .30.
Specifications:
Weight: 4.9oz (139g)
Length: 2.8″ (70mm)
Thread Size: 3/4? x 24
-
KAC URX 4 IBN Keymod Rail 5.56mm 10.75″ Length
The KAC URX 4 Rail is a fully modular design that utilizes the revolutionary KeyMod accessory mounting system. The URX 4 Rail is stronger and more stable than previous URX designs due to its one piece construction. It is also lighter due to its Integral Barrel Nut (IBN) system of attachment. The IBN system allows the rail itself to act as the barrel nut when torqued onto the rifle, completely eliminating the need for a separate steel barrel nut. KeyMod accessories may be mounted anywhere along the URX 4s length, making it one of the most user configurable designs on the market. The URX 4 includes two QD sling swivel sockets, one on the left side and one on the right.
Specifications:
Length: 10.75″
Weight: 10.2 oz
Inside Diameter: 1.55″
Outside Diameter: 1.68″ (Side to Side)Each URX 4 Rail comes complete with an installation wrench, shim kit and instructions. Other lengths available include 8.5″, 10″, 13″, and 14.5″.
-
KAC SR-15/SR-16 Chrome Sand Cutter Bolt Carrier
Debris channels to allow movement and operation in adverse conditions. Hard chrome finish. Fits KAC SR-15/SR-16 and other AR-15 variants. Carrier Only.
-
KAC URX 4 IBN Keymod Rail 5.56mm 10.0″ Length
URX 4 The URX 4 is a continuous top-rail system that utilizes the Keymod mounting brackets developed by Vltor and Noveske. This rail system is built stronger and more stable than previous designs due to the absence of a removable bottom rail. The modular layout allows an end user to fully customize exactly where to place accessories without the use of specialized tools, small parts, or additional forces applied to the barrel. URX 4 includes two QD sling swivel sockets at the rear of the rail. The URX 4 is currently available for 5.56 rifles in 8.5″, 10″, 10.75″, 13″, and 14.5″ lengths, and is equipped with Knight’s unique IBN mounting configuration. The idea was to create a more modular, and thus more serviceable, rail system that still maintains its strength and stiffness. Th IBN system torques the rail onto the weapon and allows the rail to act as the barrel nut.
This design was developed to increase stabilization and provide a simpler solution that requires less specialized tools to install and maintain. A full array of modular accessories, iron sights, and panel kits utilizing the Keymod mounting brackets have been developed specifically to accompany this rail system. With the introduction of the URX 4, Knight’s Armament Company demonstrates its continuing determination to intelligently design effective products.
SUBSCRIBE OUR NEWSLETTER AND GET UNLIMITED PROFITS
Reviews
There are no reviews yet.