Well i have taken the advice from jacespace as per above posts and still no joy the K1 fires when it wants to,
i polished the recommended parts rebuilt it including a new striker spring and striker buffer and it fired on around the first 10-15 shots then jammed up again so i put it away for a while as i was getting really frustrated,
i have stripped and opened up the main receiver body thinking i will strip as far as i can go and replace every thing on starting to strip i came across this damaged rubber part (pic attached) but for the life of me i can not identify the part ?, it is around 3-3.5mm in diameter and about 10mm in length but looks almost like a rubber pin with serrated edge or I suppose it could be a large damaged rubber oring but no idea where from if any one can please help ??..
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