arm pivot axis 52 provided within the opening 64 is a bolt 66 provided with a nut 68 and washer 70 provided between the washer 70 and the trigger bar 46 is a trigger arm 72 as shown in fig4 in the preferred embodiment the trigger bar 46 is provided with additional openings 74 and 76 to accommodate the bolt 66 nut 68 and washer 70 assembly to increase or decrease the length and weight of the trigger pull it should be noted that any desired number and placement of openings may be provided as shown in fig2 the trigger arm 72 is coupled on one end to the trigger bar 46 as described above and on its opposite end at a connection 80 the trigger arm 72 is not parallel to the rail 16 or direction of firing and is preferably provided with a bend 82 which may be configured as desired to provide the desired length and weight of trigger pull additionally alternate trigger arms 72 with bends 82 of various degrees may be substituted to adjust the length and weight of the trigger pull as desired in the preferred embodiment the trigger pull is between 0 25 pound and 5 0 pounds more preferably between 1 5 pounds and 3 5 pounds and most preferably between 2 0 and 3 0 pounds the sear assembly 78 is journaled to the frame 12 the trigger arm 72 is coupled to.