09-06-2011, 11:31 PM
This is one of the parts that is good to have as a spare. When I was still in, I always carried extra firing pin retaining pins, extractor pins, extractors, extractor springs, and extractor spring inserts. I also kept detents and springs for those naughty soldiers that performed unauthorized maintenance, just in case they did it while deployed. I saw too many M16's that would shotgun on the range when the takedown pin fell out because Joe thought he needed to remove the stock to get it extra clean to pass the stupid white glove inspections.