Great value - Anderson Manufacturing Lower Parts Kit - Stainless Steel Hammer and Trigger - Retail Packaged

For the price you get a lot of bang for your buck. The trigger group is great quality even if it is a standard mil spec pull weight. The lower parts are decent...not as robust as others I've used but they function fine. I have installed several of these kits and the black finish color varies a little so the takedown pins and/or mag release may not match your lower perfectly. All the installs I did were in Anderson lowers.

The grip is awful, but I use Ergo and Magpul K2 plus anyway. The aluminum trigger guard is fine, but I usually toss those too for something with more room. Besides those two items, to get the parts kit and fire control for under $50 is a great deal.