Knight’s Armament M5 RAS Drop In Quad Rail Kit w/ Three 11-Rib Panels for M16
The M5 Rail Adapter System is one of the most iconic and heavily issued items in US military history.
This M5 RAS quad rail installs using the delta ring and drop-in handguard method. Heavier barrel contours may require modification to the handguard. Bottom rail is removable for use with a M203.
Ships with three 11-rib rail panels. Does not ship with vertical grip.
Specifications:
- Weight: 14.4oz
- Length: 11.5″
- Free Float: No
- Material: Aluminum
- Finish: Black Anodizing


Pietro S. (verified owner) –
Came with lunch? Lol…great service I appreciate these guys for getting this to me as fast as they did
Dave (verified owner) –
Drop-in indeed. Fit perfectly in my ban-era Bushmaster with a 20″ HBAR.
A4Baron (verified owner) –
Ran my flat top musket with magpul furniture for a long time while I tried to find this handgaurd. Install was easy, locks up like a bank vault. With a quick swap over to some a2 stuff I had laying around my a4ish build was ready. Icing on the cake was it came with lunch. Top score thank you.
Max (verified owner) –
I’ve always wanted to be cool but with an old school A2 handguard, I struggled greatly. I knew once I installed this handguard on my Colt M16, I knew the cool factor had arrived. Lo and behold only a week later, my wife is now pregnant with our second child. I have to imagine this is due to the testosterone boost I got from this handguard.
NHDude (verified owner) –
Was searching for a M5 RAS for almost three years without resorting to Gunbroker, fits my PSA A2/A4 like a toddler gripping a TV remote. Got free lunch as an added bonus!