I'm looking for some parts for my sbr build and I'm thinking I want to go with quick release takedown and pivot pins (DPMS lower both are .250). Are there any others that I should look at (I saw KNS)? Also thinking about getting a charging handle like the BCMGUNFIGHTER w/mod 3 (large) latch. Are there any others to look at? I see the SOG, BCM or the SOG one better than the other?