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5KU SS-8R RIS (1913) Folding Stock - Black View larger
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5KU SS-8R RIS (1913) Folding Stock - Black

5KU SS-8R Folding Stock with RIS (1913) Mount in black.

SS-8R features an elevated cheek rest with a wide fixed buttplate.

For RIS stock mounts (1913 / M1913), compatible with MCX / MPX, DA STRIBOG SP10 A3 and RIS adapters for M4, MP5, and AK platforms.

Lightweight skeleton-style design made from aluminum.

QD sling mount holes.

Folds to both sides.

Reinforced steel mounting base.

Another product variants

  • Black
    On stock
  • Black
    On stock
  • Black
    Out stock

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    5KU44

    Folding Receiver End Plate with RIS / M1913 Stock Adapter by 5KU in black. Designed for E&L airsoft AK rifles (folding stock versions). Allows installation of stocks with RIS / M1913 interface (MCX, MPX, STRIBOG style). Can also be used without a stock for a compact AK pistol setup. Easy installation. Made from CNC-machined aluminum.

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    : Lambda Defence

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5KU SS-8R Folding Stock

Looking for a lightweight and sturdy folding stock that fits directly on a RIS (1913) stock interface and can fold to either side for easy storage or handling? Need a QD sling mount for quick attachment? Want a stock that’s compatible with popular platforms like the MCX or STRIBOG? The SS-8R brings functionality and durability in a compact and lightweight form. Its CNC-machined aluminum skeleton body ensures strength with minimal weight, while the steel mounting base guarantees a solid lock on any 1913 rail. The ambidextrous folding system works for both left- and right-handed users, and the built-in QD socket provides a secure sling attachment point. Easy to install and remove, the SS-8R is also compatible with 5KU RIS adapters for M4, MP5, or AK, giving you the flexibility to build a truly unique custom airsoft rifle.

Key Features

  • Skeleton design:
    Lightweight frame with cutouts for optimal strength and minimal weight.

  • Ambidextrous folding:
    Can fold to either side for easy transport and flexible use.

  • Reinforced mounting:
    Steel base ensures secure and precise attachment to the 1913 RIS rail.

  • Durable materials:
    Aluminum body and steel base — strength without extra weight.

  • QD mount:
    Integrated QD socket for tactical sling attachment.

  • Compatibility:
    Fits directly on 1913 stock mounts (SIG MCX, GP STRIBOG) or via 5KU RIS adapter for M4, MP5, AK, and other platforms.

Technical Specifications

  • Mount type: RIS rail (1913)
  • Length: 205 mm
  • Width: 108 mm
  • Height: 15 mm
  • Weight: 260 g
  • Body material: Aluminum
  • Base material: Steel
  • Function: Dual-side folding
  • Color: Black

Package Includes

  • 5KU SS-8R Folding Stock
ColorBlack
Body/receiver materialMetal