People probably already know of these, if not, wanted to share it. I just ordered a set to attach a Hawke red dot onto an Ataman Ap16, will update in a couple days after I receive them. Found it on amazon.
https://www.amazon.com/UTG-Airgun-Picatinny-Weaver-Adaptor/dp/B007BNHFLQ/ref=pd_sbs_200_1?_encoding=UTF8&pd_rd_i=B007BNHFLQ&pd_rd_r=c8a597a8-6f12-11e8-b33d-c9c11baedd41&pd_rd_w=iHfv5&pd_rd_wg=6mXKD&pf_rd_i=desktop-dp-sims&pf_rd_m=ATVPDKIKX0DER&pf_rd_p=5825442648805390339&pf_rd_r=34QZYBPYKW8MHR62D19C&pf_rd_s=desktop-dp-sims&pf_rd_t=40701&psc=1&refRID=34QZYBPYKW8MHR62D19C
https://www.amazon.com/UTG-Airgun-Picatinny-Weaver-Adaptor/dp/B007BNHFLQ/ref=pd_sbs_200_1?_encoding=UTF8&pd_rd_i=B007BNHFLQ&pd_rd_r=c8a597a8-6f12-11e8-b33d-c9c11baedd41&pd_rd_w=iHfv5&pd_rd_wg=6mXKD&pf_rd_i=desktop-dp-sims&pf_rd_m=ATVPDKIKX0DER&pf_rd_p=5825442648805390339&pf_rd_r=34QZYBPYKW8MHR62D19C&pf_rd_s=desktop-dp-sims&pf_rd_t=40701&psc=1&refRID=34QZYBPYKW8MHR62D19C