SAKO TAC Muzzle brake attachment for M18X1 thread will not align properly. Book says attach muzzle break until it reaches end of the thread. Says you know it is positioned correctly when gas ports are positioned to the sides and the mirage strap fitting screw is pointing upwards. However, I'm finding it to be just the opposite. The muzzle break can only be tightened down when it is upside down on the muzzle and the mirage strap fitting screw is facing down. Any suggestions?