ROCKPAK RFID Blocking Card Holder Wallet Color:MC You can change the spring

You can change the spring if you want to take it to a CQB game though

-Material: Metal / Fiber Polymer

The hop up unit is very sensitive so we would suggest using 0

and supposedly its even chambered in

ROCKPAK RFID Blocking Card Holder Wallet Color:MC You can change the springFit Type: Slim SAFE & SECURE RFID PROOF FRONT POCKET WALLET: Nylon construction thats tough, light, and dirt water abrasion resistant; RFID skimming technology that keeps wallet contents and personal data secure LIGHTWEIGHT TACTICAL WALLET: Weighs only 0. 4oz (11g) for an actual hands free weightless feel; Low profile, ultra slim design that doesnt call the attention of pickpockets EASY ACCESS CARD HOLDER: 100% genuine MultiCam Black shade, 2 thumb