S1BB M4G S1BB S1BA-E3/61T S1BA-E3/5AT S1BA S-1-B-6.6-G D/C .670 OAL S-1-B-6.6-G S-1-B-6.6-D D/C .670 OAL S-1-B-6.6-D S-1-B-3.8-G D/C .670 OAL