There is a company that is or was making a 22 magnum upper (I don't mean Leitner-Wise) and I believe it was discussed in this forum but the "Search" disappeared again so I can't find the info. I thought it was Cav Arms but I can't find it on their web site. Does anybody remember the name of the company?

Thanks for any help.

I think someone had a post about an upper made by Professionel Ordnance in 17 HRFM.

PAPPYO,
  Thanks for the information. I looked around at some of the web sites selling Professional Ordnance rifles and that is the type of design I remember seeing but I can't seem to access Professional Ordnance's web site plus there was a note in an article about the 2002 SHOT SHOW that said that the prof. Ord. carbon fiber stuff won't fit on mil spec type rifles. I guess I'll just have to keep looking or make my own.

[b]Professional Ordnance  CARBON 15 TYPE 22 RIFLE[/b]

[IMG]http://pictures.auctionarms.com/650809/GC15R22.gif[/IMG]

Semiauto. Detachable magazine. Stainless steel bull barrel, button rifled in the correct 1 in 16", target crowned, target grade and completely floated. Carbon fiber upper and lower receivers. Quick detach buttstock. Picatinny-type optics mounting base. High-impact rubber grip. Chromed bolt group, not a kit or retrofit. OAL: 35.25". Wt.: 4.75 lbs.

[IMG]http://pictures.auctionarms.com/273477/ACF4408.jpg[/IMG]

URL=http://www.auctionarms.com/search/SearchResults.cfm]http://www.auctionarms.com/search/SearchResults.cfm[/URL]

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[IMG]http://www.imagestation.com/picture/sraid42/p22a17d6f14f7119b21360d80a21285a2/fceb918a.jpg[/IMG]

"bunker"
    The one I was looking for was either the .17 HRM or a .22 Winchester Magnum Rimfire upper. There was a picture of the upper and in that picture it showed a replacement buffer and spring that was designed just for the upper. Darn, I must be having brain fade.