AL 2 DFS LASER TX obsolete, replaced by DSP/LASER - TX PRG 911-I DFS LASER RX (obsolete) DFS LASER DFS?LASER?TX obsolete, no replacement; 51752 obsolete, no replacement; 1342651 PRG920 alternative for PRG 911 -I MOD. PS 1101 DSP/LASER Kit 470722 B obsolete, replaced by DSP/LASER Kit; MSD (old name DFS ) PRG11-I DFS LASER RX Obsolete, no replacement; DFS laser RX Obsolete, no replacement;