S1K-13-G S1K1500 S-1-K-2-D S-1-K-2-D D/C .670 OAL S-1-K-2-G S-1-K-2-G D/C .670 OAL S-1-K-3.8-D S-1-K-3.8-D D/C .670 OAL S-1-K-3.8-G S-1-K-3.8-G D/C .670 OAL