Reality is It will be unachievable to make a precise duplicate as the initial prop guns used on the present were Reduce down and thus became Title II BATF / NFA SBRs (short barreled rifles) and so limited by Federal Regulation. A muzzle brake should really stand the check of https://gunsandammunation.com/shop/beretta-typhoon-muzzle-brake-1-2x28-9mm/