HK33 Style Retractable Buttstock -MKE TURKEY Quick view G3/A3 Style Retractable Buttstock - MKE Turkey Quick view Showing 1-2 of 2 item(s) Back to top MP5 furniture available here at Atlantic Firearms. We have a wide range of stocks, handguards and other furniture for your MP5 style and roller lock pistols for brands like HK, PTR and Century Arms/MKE. Auction