The MIL-STD Picatinny rail for round handguards is tapered to match the handguard of the standard GI M4 handguard and A2 rifle length handguards found on AR-15 platform assault rifles.

The KAC M4 RAS (Rail Adapter System) was developed for use on the US military’s M4 Carbine, and with over 1 million rails issued to date, it is one of the most battle proven designs available for the AR …

Dec 29, 2025 · Handguard Rail Adapters If you’re going to mount something on an AR15, you might need an adapter. Most common, this will be an adapter for M-LOK or Keymod, to the standard 1913 …

Offering dual-sided capability, it provides the option to mount accessories on both the top and bottom sides of the handguard, enabling you to achieve the perfect configuration for your tactical needs.

Rifle Requirements: The 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 …

The Knight’s Armament M4 RAS (Rail Adapter System) is one of the most battle-tested handguards ever fielded, with over 1 million units issued to the U.S. military.

Monstrum Picatinny Rail for Savage Axis | Includes Both #6 and #8 Screws for Compatibility Across All Generation Savage Axis Models | Available in 0 MOA or 20 MOA

The Forward Rail Bracket (FRB) is a direct bolt-on for M4 and M16 style plastic handguards. This rail lets you mount any Picatinny accessory to these classic rifles without having to change any stock …

The KAC M4 RAS (Rail Adapter System) was developed for use on the US military's M4 Carbine, and with over 1 million rails issued to date, it is one of the most battle proven designs available for the AR …