A little more info along the same lines. This moderator is a stackable FX small diameter about 1 1/8". Using just the front and back caps (O.A.L 2 1/2") using my phone DB meter it was 107.1 down to 83.9 w/ moderator, no baffles in the moderator. Weighs in at 1.1 oz. Does not make pistol nose heavy. Works Great. Center sections can be added.