Does anyone know the thread pitch of the muzzle brake for the ROMAK 2? Is it 24x1.5 RH thread or 14 x 1 LH thread? I wnat to remove and replace the tack welded threaded original. Also, can the Dragonuv style stock be removed and replaced with pistol grip and standard stock (am aware of asinine 922 compliance)? This particular model was made in 1997.