• Made from High Strength Spring Steel
• Hard Coating Prevents Corrosion
• Enhances Blowback Kick
• Spring Set, Includes 120% Nozzle Spring and 120% Hammer Spring
• For TM G17 Gen5
  

The package included as below:
GBB 9-7
GBB 12-8
GBB 12-9
GBB 12-41
GBB 12-43
GBB 12-47
GBB 12-51
GBB 12-54
GBB 12-58
GBB 12-60
GBB 12-61