While I would agree with you that an unknown brand of LPK from TNA isnt the best choice, buy an LPK from a known and established company such as DPMS and CMMG isnt a bad thing. Both of their LPK are very well made and will operate fine in any AR build you can do. While I do agree that they are not of the same quality as the Schmidt and Schenider parts used in military grade or high end rifles like Colt, KAC, DD etc, they are still of good quality and will work absolutely do as designed in any rifle build you may do. Ive built several AR's and all were using DPMS LPK with the exception of my IUR build which I used ALG parts (which are the same as colt, DD etc...). DPMS LPK work. Plain and simple.
Don't confused the terms established and known for quality. You say their LPK's are well made. By who and to what standard?? Seeing as there is only one standard(milspec) it is easy to say that they don't meet it, not based on their reputations and not based on the price. My experience with DPMS falls in line as well.
I'm confident all parts will work, until they don't. The question is when will that failure occur?


















































