KA-PP-17
http://www.kingarms.com/product_detail.php?id=3007
MIM Steel positioning rod for King Arms Python 357
Product information:
For King Arms Python 357 Series (KA-PG-01 / KA-PG-04),
For better durability
Reinforced parts for PG-01-16-A02
Specification:
Size  | L:30 W:6 H:4mm  | 
Weight  | 0.1 g  | 
Main Material  | MIM Steel  | 
Major Color  | Black  |