LMT 5.56 Lower Parts Kit. Complete your build with only the best lower parts kit available. This is the same kit that LMT's world famous weapons are built with so why wouldn't you want it in your rifle? 100% American Made. This Kit Includes Trigger guard assembly Magazine catch assembly Bolt catch assembly Pivot/Takedown pin assemblies Buffer retaining pin/spring Complete LMT AXLEA(R) Two-Stage trigger group S/A ambidextrous selector assembly