Upper Parts
KAC Knights Armament URX 4 5.56 M-LOK Forend Rail Kit – 8.5″
Out of stock
$271.66The KAC URX 4 Forend Kit is a fully modular design that utilizes the revolutionary M-LOK accessory mounting system.
- Length: 8.5″
- Weight: 8.5 oz.
- Inside Dia: 1.55″
- Outside Dia: 1.68″ (side to side)
- Made in the USA.
KAC Knights Armament URX 3/3.1 Rail Panel Kit – Four Piece
Out of stock
$50.25The KAC URX 3.1 Rail Panel Kit contains a basic assortment of protective panels that bolt directly to a Knight’s Armament URX III or 3.1 hand-guard.
- Lightweight polymer panels are textured for a more secure grip
- Rail Panel Kit contains a basic assortment of protective panels
- (1) 4″ Handstop Panel
- (1) 4″ Slim Panel
- (2) 4″ Standard Panels
- (4) Bottom Rail Nuts
- (8) Installation Screws
KAC Knights Armament URX 3/3.1 Rail Panel Kit – Twelve Piece
Out of stock
$88.63Knights Armament Co.’s URX 3.1 Deluxe Rail Panel Kit contains a large assortment of protective panels and accessories that bolt directly to a Knight’s Armament URX III or 3.1 hand-guard.
- (1) 4″ Handstop Panel
- (2) 4″ Standard Panels
- (3) 4″ Slim Panel
- (2) 5.5″ Standard Panels
- (1) Handstop
- (3) 8 Rib Rail Sections (3″ Long)
- (5) Bottom Rail Nuts
- (10) Short Installation Screws
- (1) Long Installation Screw
- Deluxe Rail Panel Kit contains a large assortment of protective panels and accessories
- Lightweight polymer panels are textured for a more secure grip
KAC Knights Armament URX 3/3.1 Rail Panel Kit – Four Piece, Long
Out of stock
$45.53The KAC URX 3.1 Long Rail Panel Kit contains a basic assortment of protective panels that bolt directly to a Knight’s Armament URX III or 3.1 hand-guard.
- Long Rail Panel Kit contains a basic assortment of protective panels
- Lightweight polymer panels are textured for a more secure grip
- (1) 4″ Handstop Panel
- (1) 4″ Slim Panel
- (2) 5.5″ Standard Panels
- (4) Bottom Rail Nuts
- (8) Installation Screws
KAC Knights Armament URX 4 5.56 M-LOK Forend Rail Kit – 10.75″
Out of stock
$284.13Knights Armament Co.’s URX 4 10.75″ M-LOK Forend Assembly Kit is a fully modular design that utilizes the revolutionary M-LOK 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. M-LOK accessories may be mounted anywhere along the URX 4’s length making it one of the most user-configurable designs on the market.
- Length: 10.75″
- Includes shim set and wrench
- Inside diameter: 1.55″
- Outside diameter: 1.68″ (side to side)
KAC Knights Armament Free Float MRE Rail Kit w/Filler Rail Kit – 12″
Out of stock
$512.00Knight’s Armament RAS MRE-Model B Rail kit is now available as a limited edition release from KAC’s “vault” program. The design of the MRE handguard came together to integrate with the SOPMOD Block 1 kit, issued to US military in the early Global War on Terror.
- Free-float design fits the M4A1 barrel to increase accuracy with minimal heat transfer
- Top rail aligns with M4/AR upper receiver
- MRE barrel nut is extra rigid to support the added weight of commonly used SOPMOD accessories such as lights, lasers, and optics
- Compatible with the EGLM Enhanced Grenade Launcher Module
- Upper and Lower rails reverse for lower mounting of PEQ-2, keeping the laser below the BUIS line of sight
KAC Knights Armament Free Float RAS Rail Kit – 9.35″
Out of stock
$341.04The KAC Medium Free Float RAS (Rail Adapter System) features full-length mil-spec M1913 Picatinny rails at the 12-, 3-, 6-, and 9 o’clock positions, making it compatible with any number of rail-mounted tactical accessories. The rail free-floats the barrel, allowing for consistent barrel harmonics upon firing, and thus increased accuracy potential. Includes three KAC 11 Rib Rail Panels. Requires a carbine or mid-length gas system.
- Weight: 14.7oz
- Length: 9.35″
- Free Float: Yes
- Material: Aluminum
- Finish: Black Anodizing
KAC Knights Armament URX 3.1 5.56 Free Float Rail Kit – 13.5″
Out of stock
$301.14The KAC URX 3.1 Rail is a free-floating, fully modular replacement forend for the AR-15 platform. Unlike traditional quad-rail designs, the URX 3.1 incorporates short sections of M1913 Picatinny rail at its front and rear ends for mounting tactical accessories, eliminating the commonly unused sections of rail for reduced overall weight and a more comfortable grip. A total of 4 integral QD sling swivel sockets are provided for ambidextrous sling compatibility.
- Weight: 13.8oz
- Length: 13.5″
- Free Float: Yes
- Material: Aluminum
- Finish: Black Anodizing
KAC Knights Armament URX 4 5.56 M-LOK Forend Rail Kit – 10″
Out of stock
$278.59The KAC URX 4 Forend Kit is a fully modular design that utilizes the revolutionary M-LOK 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. M-LOK accessories may be mounted anywhere along the URX 4’s length, making it one of the most user-configurable designs on the market.
- Each URX 4 Rail comes complete with an installation wrench, shim kit, and instructions.
- Weight: 10.08oz
- Length: 10″
- Inside Dia: 1.55″
- Outside Dia: 1.68″ (side to side)