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Posted: 5/24/2008 4:12:08 PM EDT
| Is it better to use a full auto BCG. I here people saying that it improves the reliability. If it really does why is it not standard in AR15's. |
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Well actually it sort of is becoming standard; with the advent awhile back of the Rock River "enhanced" carrier. There is a long history of the evolution of carriers installed in civie AR15s, and tio be honest at 1:30 in the morning I don't have the energy to lay out the whole thing, but it all started with Colt's decision, in the 1970s to cut back the undersurface at the rear of the carrier, and mill out the front undersdide of the carrier and install a notched hammer, so if you tried to file the disconnector to get full auto, the hammer would catch on the collar of the firing pin and tie everything up. The cutback at the rear was to prevent the use of a drop in auto sear (DIAS)that would e tripped by the more forward front edge of the carrier. There has NEVER been a federal requirement that this be done!! Now the aftermarket slavishly followed Colt's approach, w/o a murmer,and so all the aftermarket carriers for years followed the same pattern. Recently, Colt, trying to save a buck or two on production costs, got a ruling from the BATF that it was/is perfectly legal to have an M16 carrier in an AR15, so long as no other M16 parts are in the piece. This saves them from having to do the extra machining that "creating" that AR15 carrier would entail.. So they just started putting the M16 pieces in their ARs Rock River's Enhanced carrier dups the M16 caier under the firing pin. They still mill back the forward edge at the rear to prevent use of the DIAS. Othe shops, I am told, are now pretty much doing the same thing. Many of us just go ahead and use the M16 piece; not only brcasue it dups the weight that the AR15/M16 was designed around, but also because that cutaway inder the firing pin has led to any number of bent and broken firing pin retainers over the years. My own personal reasons for using nothing but Colt M16 bolts and carriers also include knowing that if I've got Colt pieces in my AR, I don't have to worry about some substandard aftermarket piece. Sure, I know that most aftermarket stuff these days is well made, but I'm too lazy to try and figure out which is as good as Colt, and which might not be, And since the best I can hope for is "as good as Colt", I might just as well go w/the original.  |
He pretty much hit the nail on the head. |
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