This high tensile steel rear chassis is made by precision CNC machines. It fits Glock 17 (T.Marui) GBB pistol, but NOT fits Glock 17 Gen.4 and Glock 19. It is an enhancement items, which is specially made for professional shooter and competition needs, because:
1) High precision dismension increases shooting reliability and sensitivities;
2) High tensile steel strengths construction, increases durability and reliability;
3) Smooth surface finishing is used to reduce friction inside your GBB Glock;
4) Dimension is modified for easy installation and improve smoothness sear/hammer movement. Therefore, it has difference dimension from the original T.Marui chassis.
All products are made for airsoft only. They are not made for real steel firearms.
