I have a stock pre-ban colt 6700 match hbar (I want to keep her as stock as possible). I'm planning on a full bolt dis-assembly and detailing. Since the older style cotter pins are subject to failure and jamming the bolt in recoil, I was considering upgrading to a solid cross bar retaining pin. It seems like these are simply a drop in and flare replacement. Has anyone done this and have a recommendation on a replacement (DPMS, KNS, ???). In looking for a replacement I also realized that I should also keep an oh-crap part kit like this: http://dynamicarmament.com/items/ar...colt-mfg-ar-15-ulitmate-repair-kit-detail.htm
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