5KU M4 AEG RIS / 1913 Rail Stock Base Adapter – Black

5KU M4 Receiver End Plate with RIS Adapter
Looking for a simple way to equip your AEG M4 with a stock that mounts via a RIS / 1913 rail? Need a mount compatible with TM-standard M4 receivers? Want to switch to a compact configuration without a stock in seconds? The AEG M4 receiver end plate with RIS adapter from 5KU is just what you need. This CNC-machined aluminum adapter allows quick and secure attachment of M1913 / RIS-mounted stocks while keeping the option to run your rifle stockless for maximum compactness. Thanks to its solid aluminum build, the adapter provides excellent rigidity for AEG AR15 platforms and minimizes wobble even under heavy use. Installation is straightforward — simply replace the original buffer tube interface to gain a modern RIS mounting surface compatible with MCX, MPX, STRIBOG, and similar stock types.

The stock shown is for illustration only (sold separately)

Key Features

RIS / 1913 Compatibility:Allows installation of stocks and accessories using RIS mounting for versatile configurations.
Dual-Use Design:Use your rifle with or without a stock (pistol-style setup) for improved maneuverability.
CNC Aluminum Build:Lightweight yet strong construction with precise fit and minimal play.
Easy Installation:Direct fit for TM-standard M4/AR15 receivers, no major modifications required.
Low Weight:Compact structure maintains balance without adding extra bulk.

Technical Specifications

Material: CNC-machined aluminum
Weight: 50 g
Color: Black
Compatibility: AEG M4 / AR15 (TM standard)
Mounting Interface: RIS / 1913 (M1913) stock adapter

Package Includes

AEG M4 receiver end plate with RIS / M1913 adapter