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Knex bolt action mechanisms?

Could anyone post a link to a bolt action mechanism or gun that doesn't require too many pieces. I have already tried the zkar v2 and the ar-4 but I didn't have enough pieces. I do not have any ball socket pieces and I only have one hinge pair. The ar-4 required too many tan locks. I also do not want to break any pieces. If there is not anything which can help me please post a link to an instructables of good, powerful gun that does not require many pieces, preferably a rifle. Thanks

Check the right hand column for instructables that are similar to what your looking for.