Caliber Conversion Kit


JRC Caliber Conversion kits

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Kit includes:

  • Illustrated Instruction Manual
  • Barrel – (Please be aware, we have a limited supply of 19″ 40 S&W barrels only in threaded form)
  • Complete Magazine Well
  • Complete Bolt
  • Ejector plate
  • Heavy Buffer
  • 10 or 13/15/17-Rd Magazine (depending on caliber and model)
  • All Required Tools

Does NOT ship to Canada.

Customer is responsible for knowing their state’s laws and regulations regarding magazine capacity and barrel threading options. If you are unsure, please contact your local firearms dealer for guidance.

If you live in a restricted state (CA, NY, NJ, MD, MA, CT), you have restrictions that affect the configuration.  Your kit will include the parts necessary to keep your gun compliant assuming you purchase the appropriate kit and your gun was compliant before the caliber change.

PLEASE BE AWARE, these kits ARE NOT for AR-15 rifles.  They are proprietary to JRC.  THEY WILL NOT FIT AN AR-15.

Any refunded item will exclude original shipping cost to customer.

*** Conversion kits are subject to an additional shipping expense ($20 included in the price) as the Post Office has raised rates recently and we are covering the increase in price.

Additional information


9mm, .40S&W, .45ACP


Threaded, Unthreaded

Magazine Rnds

10, 13, 15, 17


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