I have an old markII and a single six and they have both been good for squirrel and other little critters over the years.If it has good adjustable sights then it should work fine my markII is only adjustable for windage but thats the only adjustment it needs the elevation is a close to dead on as my eyes are so it's perfectly capable of good accuracy if you can hold it steady,I like my single six a little better seems a little more accurate but I have an older markII with a shorter barrel and not as long of a sight plane to focus on.Good Luck!!