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

5KU M4 Receiver End Plate with RIS Adapter

The 5KU M4 Receiver End Plate with RIS Adapter is a compact and durable upgrade for AEG M4/AR15 platforms, designed to convert a TM-standard M4 receiver into a modern M1913 / RIS stock mounting interface.

Perfect for players who want to install 1913 rail-mounted stocks or run a lightweight stockless CQB setup, this CNC-machined aluminum adapter gives your airsoft rifle a cleaner, more modular configuration without adding unnecessary weight.

Key Features

• RIS / 1913 stock compatibility: accepts M1913-style folding or compact stock systems.
• Dual-use design: allows stock-mounted or stockless pistol-style configurations.
• CNC aluminum construction: strong, lightweight and resistant to field use.
• TM-standard M4 fitment: designed for AEG M4 / AR15 receivers.
• Compact 50 g design: improves maneuverability without unbalancing the replica.

This adapter is ideal for custom M4 AEG builds, CQB rifles, PDW conversions and modern MCX/MPX-style setups. Explore more upgrade options in our airsoft external parts collection or complete your rifle build with items from airsoft accessories.

Package Includes

• 5KU AEG M4 receiver end plate with RIS / M1913 adapter

Technical Specifications

Brand	5KU
Product Type	M4 Receiver End Plate with RIS Adapter
Material	CNC-machined aluminum
Color	Black
Weight	50 g
Compatibility	AEG M4 / AR15, TM standard
Mounting Interface	RIS / 1913 / M1913 stock adapter
Body / Receiver Material	Metal