Fox Airsoft gives an overview of the Lancer Tactical Gen 3 Mk18 AEG that comes equipped with a MOSFET that you can program... "Lancer Tactical has been a long running brand that offers guns and equipment for players of all budgets. Arguably, their most popular guns are their sportline models packed full of features at a price anyone can get behind. The latest updates are the addition of the 3rd Generation lineup which makes some ergonomic and internal tweaks to make for an even better gun. Inside now is a programmable MOSFET accessed by the trigger that offers fire modes and other premium features. The ubiquitous Gen 2 Lancer Tactical M4s are still being offered for those who want a simpler beginner friendly gun at a lower price."