GSS2.5 GSS2 GSS-19-7-G S/C OAL GSS-19-7-G GSS-19-3.8-G S/C W/HOLE SS SPGS .400 OAL GSS-19-3.8-G GSS-19-2.2-G GSS-18-7-G S/C OAL GSS-18-7-G GSS-18-3.8-G S/C W/HOLE .405 OAL