Our New Thin Rear Stock Adapter with Upgraded Folding Adapter for AK47 Pistols allows the option to add almost any AR buffer tube, commercial or Mil spec and a rear stock, ATF Blade or Arm Brace. Upgraded folding adapter offers upgraded machined parts, machined improved locking buffer tube slot to prevent turning, upgraded hinge spring, improved, wiggle. Blade and KAK tube sold separately.*Fits most AK/ LYNX/HELLPUP pistols.