db 3d printed mmr22

MMR-22 STL Files

The 3D Printed Multi-Model Receiver 22
Why Have One When You Can Have Five?

This one’s for all you plinkers out there who are too cool for Ruger. This 5-in-1 special is fun for the whole crew, with probably the shortest shopping list I’ve ever seen. Providing compatibility for Rossi, Mossberg, Citadel, and Magtech parts kits, the key word of this release is interoperability, meaning the receiver is a one-stop-shop no matter who’s parts you’re buying.

DB Firearms is a well-known developer of high-performance projects like the DB Alloy, Tac Driver, and FNS Crusader, and the MMR-22 is no different. Simple geometry means straight-forward printing, so if you’re a novice builder looking for a great starting point, or even an experienced builder looking for a casual no-frills build, this is the perfect one for you.

In The Wild

Photo rs22

Technical Specs

The files are designed to accommodate PLA+ as a minimum, though documentation recommends NylonX for long-lasting prints. Durability may vary depending on selected printing materials.

The package includes a railed and rail-less version, as some parts kits require one or the other for fitment. Supported parts kits are as follows:

  • Rossi RS22
  • Mossberg 702 Plinkster
  • Mossberg 715 (All variants)
  • Citadel TRAKR (All variants)
  • Magtech 7022

Parts List


  • Complete parts kit for any of the supported models


  • 2 – M5 square nuts


  • Punch set
  • Armorer’s hammer
  • Allen/hex key set

Build Instructions

The DB Firearms MMR-22’s low barrier for entry makes it the perfect build for anyone. Download and build one today!

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DISCLAIMER: 3D STL files are for learning and documentation purposes only. The users of this website and files need to be aware of all applicable local, state, federal and regional laws. 3D Gun Builder does not encourage, condone, or promote any illegal activity.

3D Gun Builder ( does not host, provide, develop, and/or have any affiliation with the firearm STL files or All files are hosted by a third party.

Kem Regik
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