Rocket High Rebound Spring Spring Rating:M190 this deluxe edition comes with

this deluxe edition comes with medium and large interchangeable backstraps

The Heckler and Koch is an authentic HK replica with Gas Blowback power

All non-qualifying orders will be canceled and refunded immediately

This GLOCK 17 Gen5 airsoft pistol faithfully replicates the same features externally as the firearm

Rocket High Rebound Spring Spring Rating:M190 this deluxe edition comes withMaterial: Japan piano wire Color: Black Descriptions: This type of spring is used for replacing the original one. Original springs are made of Chinese piano wire. Rocket black springs are made of Japan material, which can stand over 10,000 times pressing test.