I have a bin full of parts for your favorite 80's sub gun, lots of parts for the short or Kurz (K) model. I have a full size, and was planning to do another build as a K, but I am good with just my full size and the other PCCs I own. So, the parts I have collected can go. As seen in the pictures, I have the following, all either brand new or very lightly used:

• Lee Sporting K Model LS5 billet aluminum lower receiver, accepts AR controls and grips.
  SOLD
•  Timney two stage (4 lb pull) trigger pack $300 new  $250 OBO
  https://timneytriggers.com/hk-mp5-two-stage-trigger/
• B and T Slider stock (K model)                       SOLD
  
  
• HK Parts ACR style folder stock (K model)    $580 new  $450 OBO
  https://hkparts.net/stocks-braces-slings/magpul-hkp-hk-sp5k-acr-stock/
  
  
• Midwest Industries Minimalistic side folder    $210 new  $150 OBO
  https://midwestindustriesinc.com/minimalistic-side-folding-stock/
  
  
• Two Upper receiver pic rails, not sure manufacturer, SOLD
  
  
• Magpul Ambi Safety $50 new $30 OBO
  
  
• Midwest Industries Full size pic rail end cap $90 new  $60 OBO
  
  
• K model broom handle front grip with M-LOK front rail  SOLD
  
  
• Midwest Industries M-LOK fore end SOLD
  https://midwestindustriesinc.com/mi-hk-mp5-mp5k-handguard-m-lok-tm-compatible/
• Two HK Parts Extended Mag Release Paddles $45 new  $25 OBO each
  https://hkparts.net/all-parts/hkp-paddle-style-extended-mag-release-emr/
  
  
• Two Magpul SLGrip Module lower receivers, full sive MP5 and HK93/94 and their clones  $60 new $45 OBO each
  https://magpul.com/magpul-sl-grip-module-hk94-93-91-semi-shelf-clone.html?mp_global_color=118
• Full size AP5 front handguard, stock, $5
  
  
• Full size AP5 lower receiver with stock safety and trigger, $30