Size of muzzle: R3L 16 23 3.5 8 B3 R0 1 R4 17 24 30 9 B3.5 R1 10 18 25 4 B4 OB1 R1L 11 19 26 4L D1 OB2 R2 12 2 27 5 B0 OB3 R2L 13 20 28 6 B0.5 D2 J1 OB4 R3 14 21 29 6L B1 BT D3 J2 R3.5 15 22 3 7 B2 0