I forgot to mention that i was looking for spare parts that meet or exceed the Mil-Spec for my BCM 16' Mid-Length Carbine. Thanks, i really appreciate you taking the time to share this information, it's what i was looking for. Other good mil-spec quality LPK are Daniel Defense, Spikes Tactical, and LMT. I'm a long time Colt AR owner for forty years now, I had six former rifles and carbines and currently have three and had no problems at all, on my high use couple of rifles that had 12 to 15K mileage I only have to change all the springs all the machined parts are still pretty good. I've only used a small sample of three LPK which are Colt, RRA, and Stag all are functionally fine but I notice the Colt had better looking machining surfaces, also Colt sells kits without FCG parts (see Specialized Armament Warehouse, Brownells, and official Colt dealers). The opposite are the commercial manufacturers that doesn't follow the mil-spec manufacturing procedures to save cost, like softer steel material, weaker heat treatment, accepts more variations in machining dimensions, etc.

In my personal opinion and long experience the key word in a good quality LPK is Mil-Spec, because the manufacturer that made the parts makes them to a standard which is good enough for extreme use of the military. I should add that i really don't need the FCG because i have a Geissele SSA FCG and plan on buying another as a spare but i want the rest of the LPK for spares. I looked at the Colt LPK's but wasn't sure if the parts were Superior or if i'd just be paying for the name. Thanks guys, i really appreciate the help.

Best ar lower parts kit 2016