realign fromt sight?

[justwannano]

After declaring war on garden eating rabbits I was astonished at how bad a shot I had become. The old 22 had been used as a trapline gun for years and
has taken quite a beating over those years.
Still astonished at missing several rabbits only 50 feet away by 6" I began to suspect the rifle.
I've been told that even though this is a Sears model 3T rifle it was made by Winchester.
Anyway the front sight no longer sits flush with the barrel. The pad that the blade sits on, actually only one piece, is .420 X .450 and is inlaid into the barrel.
one side is raised up.
Are these just pressed into place?
Can I just tap it back into place?