look at JP arms..Which AR lower parts kit do you prefer when assembling your lowers... There's so many out there now...
Oh yes there triggers are very nice.. I only asked about the ALG ACT because it's going in a self defense M4 and was just looking for something not as gritty as the factory trigger.. The parts kit and nice trigger will go in a full size ar15 I have been wanting to build for awhile..why not get the best. Barrel and trigger are the most important parts of an AR.
https://www.google.com/url?sa=t&source=web&rct=j&url=https://m.youtube.com/watch?v=ypb5HXdDJhc&ved=0ahUKEwj5y6u21p_XAhWDMSYKHSA5CfkQwqsBCKQBMAg&usg=AOvVaw24UFokDiF0zzwhSwIPVz-T