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