JMac - MDi-co

1913 Adapter for MP5 and Clones

(4 Reviews)
Current Stock:
4.00 Ounces

Finally a way to mount our 1913 stocks/braces to your favorite full size MP5 clone!

This adapter will fit the Standard/Full Size MP5 as well as HK33 (556). It has a picatiny rail machined on the rear which allows you to install our 1913 style stocks/braces!  

  • 7075 Aluminum
  • Hardcoat Anodized
  • Includes a replaceable recoil buffer
  • No permanent modifications required
  • Simple installation
  • Adjustable cheek weild 
  • May not be compatible with some SP5 models, due to tolerances.

     *Not compatible with CNC Warrior 1913 stocks/braces.

            *Requires JMac 1913 Folding Mech 


Reviews (4)

rsa-mp5 1913 STOCK ADAPTER

Written by Chase Gilbert on Sep 15th 2021

This item is a perfect fit for my MKE AP5 MP5 clone. The RSA-MP5 adapter shipped and arrived in just a few days, way faster than I was anticipation. The adapter fit snug and only required some mild tapping to get it to fit. The quality and craftsmanship is top notch. If you are in the market for a different set up to your MP5 this and a 1913 Stock/Brace are a solid way to go.


Written by Mohammed elagamy on May 20th 2021

Excellent product just as described

Love it

Written by JACKSON on Jun 25th 2020

I just got this in the mail. Installation did require a rubber mallet like the description said. No issues, mp5s are always finicky when changing the rear cap. Works great and feels amazing. Installed a mcx folding brace and it’s looking sweet.


Written by Ryan Martens on Jun 20th 2020

Look, stop staring at this magical piece of machines marvel and just buy it. As soon as this RSA hit my mailbox, I skipped my happy butt out and got it, skipped back and tore the package open while grabbing my HK MP5. This thing fits! It’s slightly tight but as soon as I got it on, the pin hole lined up perfectly! Paired with the JMAC stock with the 1913 folder it’s straight sexy! The vertical rail allows you to adjust up and down on the stock so you can line up your sights with the cheek well. I’m so glad I found them and will be using them for future firearms parts.

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