Size of muzzle: 2 5 B0 OB3 12 R2 3 7 B2 R3.5 0 4 B4 OB1 10 6 B0.5 D2 J1 OB4 13 R2L 3.5 8 B3 R3L R0 4L D1 OB2 11 R1L R3 6L B1 BT D3 J2 9 B3.5 R4 1 R1