S1K650 S-1-K-6.6-G D/C .670 OAL S-1-K-6.6-G S-1-K-6.6-D D/C .670 OAL S-1-K-6.6-D S1K520 S1K50000 S1K320 S-1-K-3.8-G D/C .670 OAL S-1-K-3.8-G