I just temporarily mounted one beneath the barrel, close to the breach end on a small standoff so the beam clears the muzzle brake. Hardly noticeable. Its magnificently accurate. After I sighted it in, I can hit an inch or less from across the room. Deadly. At close range, like 4', it hits the red dot every shot or within 1/4".

That little gun is powerful. It almost puts holes through the cardboad target. If I'd known that first, I wouldn't have let it hit me. Really smacks hard on bare skin. Not a kids toy. I must have got a good cannon on this Pershing.