Derya TM22 Buffer Tube 1913 Picatinny Rail Adapter

Derya TM22 Buffer Tube to 1913 Picatinny Rail Adapter

Replace the factory buffer tube on your Derya TM22 (or RIA rebrand) with a 1913 Picatinny rail interface. This opens the rifle up to the huge world of Picatinny-mount stocks — folding stocks, fixed stocks, braces — instead of being stuck with buffer-tube furniture.

It threads into the same port the factory tube uses and presents a standard 1913 rail tang. Direct, reversible swap: unthread it anytime to go back to stock.

Print settings

• Material: Structural part on a firearm. The 3MF is set up in PLA-CF, but PETG is the smart choice for range use. Skip plain PLA.
• Nozzle / layer height: 0.4mm nozzle at 0.2mm layer height
• Walls: 4+ perimeters
• Infill: 50%+ (solid in the threaded/rail sections if you can)
• Orientation: Print the threaded section upright, and the rail on a 45° angle.

Assembly

• Press the nuts into the buffer adapter; glue if necessary.
• Run a test print of the threaded part first to confirm a good fit before committing to the full print.

Fitment notes

• Hand-thread the adapter to check fit. The TM22 thread matches AR buffer-tube pitch, but you may need to clean printed threads.
• Confirm your stock clears the receiver and charging handle before live fire.
• Hand-cycle the bolt fully to the rear before firing to make sure nothing binds.