Barrel comparison shots....
4516 vs 4516-1
Note the difference in feedramp geometry & width. Also note the difference in width of the barrel camming lugs.
You should also be aware that due to the width of the camming lugs, a no-dash barrel will only fit in a no-dash frame.
4516-1 vs 4516-2
Here again there's a difference in feedramp geometry. Especially take note of the difference in width of the barrel hoods.
