I am looking to buy a good used scope for use on a .22 cal rifle.  I use the rifle for 50 to 100 yd target shooting.  Currently looking at an auction on an older Burris Signature 6 - 24x scope.  My question is do these scopes have adjustment for parallax?  What size rings do they need?  Any comments either positive or negative might be helpful.  Thanks.
				
			
	








			