FIRE CONTROL UNIT, REV. 3, (FCU) KJW It replaces the stock Picatinny

It replaces the stock Picatinny rail adapter with a low profile mount for M-Lok handguards

56x45mm NATO (

Back yoke shoulder pads distribute weight evenly

A TPU outer shell and a PE panel provide dual-layer protection

Magazine Release: Design Ambidextrous

FIRE CONTROL UNIT, REV. 3, (FCU) KJW It replaces the stock PicatinnyThe REV3 FCU follows the classic design of our very first FCU and it is considered to be the finest fire control units on the market. Since it is equipped with an LCD screen and joystick you are able to easily scroll through menus and precisely adjust settings for the utmost control over the system. This FCU is also universally compatible with all PolarStar HPA systems including both dual and single solenoid systems. This latest REV3 model features