17 HM2 Ruger 10/22 Conversion Kits - 17 Mach 2 barrels and Heavy Bolt Handles Convert your Ruger 10/22 to 17HM2
17 HM2 Conversion for Ruger 10/22 Rifles
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  We are sorry to announce that our 17 HM2 Conversion Kits have been discontinued due to the lack of availability
of good quality ammunition. This article is presented for educational, informational, and historical purposes only. 

DISCONTINUED - 17 HM2 Conversion System for the Ruger 10/22 - DISCONTINUED!

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Ruger 10/22 Converted to 17 HM217 Mach 2 Heavy Bolt Handle Assembly for Ruger 10/22
Above: Converted Ruger 10/22 and Close-up of Heavy Bolt Handle
Our Special 17 HM2 Heavy Bolt Handle Assembly provided the bolt mass to properly time the Ruger 10/22 action to fire 17 Mach 2 ammo safely and reliably... And, our 17 HM2 Target barrels installed just like any other 10/22 Target barrels! Was it Difficult?... NO! We had complete Photo Illustrated Instructions that guided youstep by step through installation of the 17 HM2 Heavy Bolt Handle Assembly, 17 HM2 Target barrel,... even the rifle stock and scope mount!
17 Mach 2 Trajectory Chart

17 HM2 Barrel/ Bolt Handle Conversion Kits for Ruger 10/22

  We are sorry to announce that our 17 HM2 Conversion Kits have been discon- tinued due to the lack of availability of good quality ammunition. This article is presented for educational, informational, and historical purposes only. 

** Ruger 10/22 and 17HM2 Warnings **

Here's How It Worked: The 17 Hornady Mach 2 (HM2) is a 17 caliber version of the 22 LR rimfire cartridge. It shoots a heck of a lot faster and flatter, however (click Data at left). The blow-back semi-automatic Ruger 10/22 needed more bolt mass to time its fire, eject, and rechamber cycle to work right with this faster shooting 17 HM2 round... Merely installing a 17 HM2 barrel is not sufficient. Our 17 HM2 Heavy Bolt Handle Assembly added the necessary mass... a simple, elegant solution.
Barrel/Bolt Handle Kits: For obvious reasons, we didn't sell 17 HM2 barrels without the 17 HM2 Heavy Bolt Handle Assembly... you needed BOTH a 17 HM2 barrel AND our 17 HM2 Heavy Bolt Handle Assembly to do a proper conversion of the Ruger 10/22 from 22 LR to 17 HM2 ammo.
  DISCONTINUED - This system worked well in the first years of 17 HM2 ammo production. But we started hearing of occasional problems that seemed related to ammo quality. We did extensive testing to look for a solution but in the end, we couldn't get it to handle the occasional bad round of ammo. And without good ammo our conversion became obsolete.
  It's Been Tried - We're leaving this and our TEST DATA up so that others who want to try it will know it doesn't work without good ammo.
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E. Arthur Brown Company, Inc,  CONTACT US , 4088 County Road 40 NW, Garfield, MN 56332
ph. 800-950-9088, FAX 320-852-2871 , Visit Our Online Store at eabco.net