(R)ailed(S)tock(A)dapter(MP5K)

Finally a way to attach 1913 style stocks/braces to your MP5K.

The RSA-MP5K adapter will fit the MP5K and clones. It has a picatiny rail machined on the rear which allows you to install our 1913 style stocks/braces!  

• 7075 T6 aluminum
• Hard coat/black anodized
• 1913 milspec rail
• Includes choate buffer
• Adjustable cheek wield
• Allows attachment of pistol braces
• Installs using factory pins
• Fits MP5K clones (will not fit reverse stretch)
• May not be compatible with some SP5K models, due to tolerances.

 *Not compatible with CNC Warrior 1913 stocks/braces.

 *Will not work with collapsible PDW style stocks or braces 

Attaching a stock to a pistol makes it an SBR and requires NFA approval. You are responsible for knowing and following your local/state/federal laws!

JMac Customs LLC is not responsible for the end users misuse of our products.

If you have misplaced or damaged the hardware you received with your item you can find replacement hardware here