I just picked up a brand new p-n: GU312 chipset off Ebay that is listed in the Arcade manuals for the two arcade shooters of the 5 Konami M2 titles! Has two brand new trigger, optic, and standard pcbs for the purple konami light guns used for the Konami M2 titles 'Evil Night/Hell Night' & 'Total Vice'. Can't beat 40 bucks shipped!!!