Best price
$401.99at Brownells
In stock checked Oct 1, 2026
Where to buy
| Store | Price | Availability | Buy | Add to build |
|---|---|---|---|---|
| Brownells Best price | $401.99checked Oct 1, 2026 | In stock | Buy at Brownells | |
| MidwayUSA | $402.99checked Oct 1, 2026 | Out of stock | Buy at MidwayUSA | |
| OpticsPlanet | $439.99Salechecked Oct 1, 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.
Price history
Lowest in-stock price in the last 30 days: $401.99 at Brownells. Dashed line = out of stock. Tracking since Sep 27, 2026.
Show the prices as a table
| Store | Latest | Lowest | Highest |
|---|---|---|---|
| Brownells | $401.99 | $401.99 | $401.99 |
| MidwayUSA | $402.99 | $402.99 | $402.99 |
| OpticsPlanet | $439.99 | $439.99 | $439.99 |
Since Sep 27, 2026.
About this part
The AR15 5.56 Free Float RAS Mk12 Mod 1 is an AR-15 handguard from Knights Armament. It's sold by 3 stores (1 in stock), from $401.99 to $439.99. The lowest in-stock price in the last 30 days was $401.99 at Brownells.
Specifications
- Manufacturer
- Knights Armament
- Platform
- AR-15
- Caliber
- 5.56 mm NATO
From the manufacturer
The KAC Free Float Rifle RAS has been in service with a variety of military units, proving itself as one of the most versatile and rugged handguards available. The 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.
This Free Float RAS requires that the rifle have a carbine or mid length gas system and a low profile gas block. Disassembly of the rifle’s gas system and removal of the factory barrel nut will be necessary. This forend uses a proprietary barrel nut that may be installed using a standard AR-15 armorer’s barrel nut wrench (sold separately). For AR-15/SR-15 based platforms only; not compatible with SR-25 variants. Installation instructions are included.
Big Book Catalog, Issue:70, Page:051
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