Best price
$329.99at Brownells
Out of stock checked Oct 23, 2026
In stock now instead
- URX-6 5.56mm NATO 10.5" M-LOK Handguard For Kac SR-15 $287.28at Brownells
- AR15 5.56 Free Float RAS Mk12 Mod 1 $401.99at Brownells
- PRI Gen III Round Free Float Dark Earth $329.99at OpticsPlanet
Where to buy
| Store | Price | Availability | Buy | Add to build |
|---|---|---|---|---|
| Brownells Best price | $329.99checked Oct 23, 2026 | Out of stock | Buy at Brownells | |
| OpticsPlanet | $369.99Salechecked Oct 9, 2026 | Out of stock | Buy at OpticsPlanet |
Prices and availability change often, so confirm on the store's site before you buy. We may earn a commission from these links.
Similar handguards in stock
This part is out of stock at every store we track. These similar handguards are in stock, with today's prices.
Price history
Dashed line = out of stock. Tracking since Sep 27, 2026.
Show the prices as a table
| Store | Latest | Lowest | Highest |
|---|---|---|---|
| Brownells | $329.99 | $329.99 | $329.99 |
| OpticsPlanet | — | $369.99 | $369.99 |
Since Sep 27, 2026.
About this part
The M5 Rifle RAS Handguard is an AR-15 handguard from Knights Armament. It's sold by 2 stores, from $329.99 to $369.99.
Specifications
- Manufacturer
- Knights Armament
- Platform
- AR-15
From the manufacturer
The KAC M5 RAS (Rail Adapter System) was developed for use on the US military's M16A4, and with hundreds of thousands of 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 M5 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.
Rifle Requirements: The M5 RAS is a drop-in replacement part for standard, 2-piece polymer, A2-type handguards. The rifle must have a rifle length gas system, delta ring assembly, fixed front sight/gas block, and either a round or triangular handguard end cap. Lighter barrel profiles work best (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.
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