L'Antre du Dingo likes the Perun Airsoft G&G ETU Upgrade Kit which of course is made for G&G AEGs... "What a nice idea Perun had! They designed a small ETU replacement unit for G&G guns. It adds many cool features and improves the efficiency of your gun and of course you keep the electronic trigger! Let's have a look at this small thing which will quickly hit the stores and become a classic!"