I have an MX trigger that is pull / pull bottom first and has the Allem release hook for the top barrel. The previous owner had the hammer and cocking paw removed so he could use it for his top single with the Allem release. Pulinski put a new hammer and cocking paw back in. Ser # is 39318 (( $500 Delivered to your address in the Lower 48 )) Any questions please send a conv message for info and contact # - Thanks Bob