Tapco G2 trigger groups, recently put in three imported AK 47 clones. Why? The original US-made disconnectors caused a bit of stinging "trigger slap" upon reset. Very simple to remove the "shepherd's hooks", then tap out the two retainer pins (-- No vice is needed for any of this---). Youtube….Then wrap a bread bag 'wire tie' or rubber band to hold the hammer spring ends together, insert the (modern) improved disconnector and also, if somehow needed, the hammer. A second internal swap: the $8.00 pin retainer plates, to Replace, and avoid an Awkward struggle in a Very tiny space with the original, very stiff "shepherd's hooks". You simply push the plate's edges into the grooves in both retainer pins, once these pins are again in place, and insert the safety into the rear opening (third hole), as seen on YouTube. If needed, a gentle wiggle of the new disconnector easily allows the edge of the safety's axis to clear it. Some YouTube videos have no substitute. To paraphrase "They can't be reasoned with, they can't be bargained with...(-Sarah Connor-)".