HFC Glock 17
 

I field stripped my glock 17 to touch up the paint on the slide. when I removed the inner barrel from the outer i noticed a small rubber o-ring. When I put it all back together an put the o-ring back where i thought it should go. Of course, I was target shooting in the back yard and the o-ring went flying into the vastness that is my back yard.

My question is this. IF i can find a replacement, where is the proper location for the o-ring?

M.