M4A1 Series 2
M4A1(75)a M4A1(75)a R
M4A1(75)b M4A1(75)b R
M4A1(75)W M4A1(75)W R
M4A1(75)W RC M4A1(76)W
M4A1(76)W R M4A1E8(76)W
M32B1 TRV M34B1 TPM