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Knights RAS 7" Drop-In AR15/M4 Carbine Length Quad Rail
Knights RAS 7" Drop-In AR15/M4 Carbine Length Quad Rail

Price: $250.73

Stock Status:In Stock

SKU: 98064


Knights RAS 7" Drop-In AR15/M4 Carbine Length Quad Rail


The Knights Armament M4 RAS (Rail Adapter System) was developed for use on US military M4 Carbines utilized a 14.5 or 16" barrel. With over 1 million rails issued to date, it is one of the most battle proven designs available for the AR15 platform. This 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 rifleā€™s barrel nut via a clamp and screw arrangement, making it a very solid foundation upon which to mount tactical accessories.

The KAC 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 AR15/SR15 based platforms only; not compatible with SR-25 variants.

Installation instructions are included.


  • Installs in minutes
  • Four MIL-STD Picatinny rails at 12, 3, 6, and 9 o'clock
  • Includes 3x Rail Protection Panels
  • Compatible with carbine length gas systems


  • Weight: 8.9 oz
  • Length: 6.25"
  • Machined from 6061/T651 Aircraft Grade Aluminum
  • Mil-Spec hard coat anodized

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Average Rating: Average Rating: 5 of 5 5 of 5 Total Reviews: 1 Write a review »

  0 of 0 people found the following review helpful:
5 of 5 Ladies love the KAC January 23, 2020
Reviewer: BRAD from Fairfield, CA United States  
Awesome product, fits like a glove, sturdy, solid and will take a beating. Took me a minute to install it because I’m dense and I’m not a mechanical brain, I’m better at breaking shit and shooting shit. I’d buy another one. Not a free float rail.

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