AR Sponsor
Posted: 5/11/2010 8:51:39 PM EDT
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OK, So I think I'm starting to understand this stuff a little bit. My question is when I'm looking at BCG's there is always a not about whether it is an "auto" or "semi" BCG...what is the difference between the two? It seems that everyone here is pretty big fans of the BCM stuff and thats the way I'm leaning.
Help? |
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an auto bolt carrier has some extra meat on the tail end of it used to trip an auto sear in an M16... in semi-auto guns it's just a little added mass since you don't have an auto sear...
if you take a trip in the way back machine, the semi carriers used to come with unshrouded firing pins, this meant that the head of the firing pin was actually making contact with the hammer every time the rifle cycled... there was a thread a week ago showing the effects of the hammer on the FP in an unshrouded carrier... nowadays most SA carriers have the shrouded firing pin... as of 2005, Colt started using FA carriers in their LE and MT guns, they received clarification from BATFE that since the BCG alone WILL NOT cause an AR15 style rifle to fire multiple rounds with a single trigger pull, it is not considered a machine gun part, and is perfectly legal to own and use in semi auto rifles... anyway, just get the full auto carrier and call it a day... |
| Absolutely get the full auto BCG. It will smooth out the cycling of the gun, and it will give you the feeling of less recoil. (not the AR's recoil much anyway) Just be sure to buy a good BCG. I have had really good luck with LMT and BCM. Lewis Machine & Tool company started putting MIM (metal injection moldingl) gas keys on about a year ago, but I have one and haven't experienced any problems at all. |
AR Sponsor