[QUOTE=BuckeyeChuck;136441236]I'm fairly new to gun ownership and shooting, and all of my attention has been on handguns. I find myself wanting an inexpensive rifle chambered in .22lr, but as I have little knowledge, I ask the advice of my more knowledgeable friends here.

What are my constraints? Primarily cost. Secondarily, I'm open to advice on something that can be easily outfitted to other calibers, like an AR.

As AKA Guy22. The 22 doesnt stand for age. I have ~ 40 .22lr rifles. You don't give price range, purpose, semi- bolt, etc

What are my constraints? Primarily cost.
If cost is king you a looking used.
In semi auto you will find a Marlin 60 a best buy. ~ $100.00 home. If you don't find one send me a PM, I have plenty.
Some other ones Ruger 10/22, Whinchester 190, & Reminton 597. Some of these will run you around $200.00
Bolt guns go with a Marlin or Savage. Can grty good ones for ~ $80.00 to $200.00.

"I'm open to advice on something that can be easily outfitted to other calibers, like an AR."

The best is the S&W M&P 15/22. Why do I say that? Everthing I have added on my AR. will fit my S&W M&P 15/22
It sounds like you want to be tactical cool. Price wise the Mossberg, Colt, might sound good. I would save money and get a S&W M&P 15/22, GSG 522SD, Sig 522 SWAT Commando.

JMHO
Guy22