I am getting parts to put an AR together and was wondering are there much differences in different brands of the upper and lower parts kit, minus the trigger? Which do you prefer? Thanks.
I prefer the White Oak Armament LPK due to it not coming with a trigger. This saves you $30-$40 you can put towards a Geissele.
Daniel Defense and CMT are the other two I would reccommend if you dont plan on swapping the trigger.
JP also has a LPK that does not include a trigger and is considered top quality. Rock River Arms sells a LPK that is excellent IMO and you can get the Rock River kit with a two stage national match trigger that provides a trigger upgrade if you don't want to spend the coin on the Geissele. I run the Rock River kits in most of my AR's and they are good.
I purchased an LPK w/out FCG and UPK from Palmetto State Armory for $25 each when they went on sale. Ironically enough, I only needed the springs and detents from the LPK. Everything else was aftermarket. Joe Bob Outfitters will sell you an LPK w/out FCG for 24.95 when you buy certain triggers.