Perun ETU++ MOSFET for G&G ETU Gearboxes valken-v-tactical double O-ring aluminum nozzle and

double O-ring aluminum nozzle and cylinder head

Highly Customizable VSR-10 platform

Each HK45 comes standard with an extra backstrap

Includes a package of retention strap

Steel mesh construction rated for up to 40 hits at 400 FPS at point blank range

Perun ETU++ MOSFET for G&G ETU Gearboxes valken-v-tactical double O-ring aluminum nozzle andFeatures Electronic burst Active brake with adjustable braking power Precocking with spring release feature Rate of fire reduction DMR mode Low battery voltage alarm Programming supported with a multicolor LED diode Diagnostic system & electronic resettable fuse ETU++ is a dedicated replacement for G&G ETU electronic board. It enhances your trigger unit by adding many new, useful features. Simply disconnect the stock electronic board and plug in