This is the link I used to learn about the FCG.
Once you do it a couple time, it is fairly straight forward.
Does anyone know where I can get instructions and or pictures on how the swap these trigger parts. I need to put my SL8 trigger parts in a G36 lower housing. It looks pretty complicated. Thanks Colt
HK USC/UMP conversion
HK SL8/G36K conversion
MP5 .40 pistol (Clone)
MP5SD (SBR INW) (Clone)
MP5F (SBR) (Clone)
MP5K PDW (SBR) (Clone)
Vector HK53 Build
HK USP Tactical .45 ACP
Lots of other high end non HK firearms.