Posted: 8/13/2014 7:40:02 PM EDT
[#23]
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With an M16 auto sear, the M16 selector, on auto, holds down the extended tail of the disconnector, and has a relief for the tail of the M16 auto sear to allow it to move and function.
On semi, the M16 sear is pushed out of the way by the selector and becomes stationary, while the disconnector is allowed to move and function.
With a DIAS, the auto sear has no tail and moves and functions 100% of the time, as it is not held back by the selector on semi.
In semi, the disconnector is still holding the hammer when the bolt closes and trips the auto sear, so the hammer doesn't drop until the trigger is reset and pulled again. View Quote View All Quotes View All Quotes Quote History Quoted:
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Dumb question:
Does semi still work, and if so, how is the drop-in sear moved out of the way by the selector?
It doesn't get moved ... because it doesn't have to.
The drop-in sear locates the autosear in the exact same position in the full-auto fire-control group as does a factory, drilled receiver. So the drop-in sear interacts with the full-auto hammer/trigger/disconnector/selector in the same way that a factory sear does.
That's why when you have a DIAS, you must switch out the host's semi fire-control group for a full-auto fire-control group. Otherwise, it will not work.
I was under the impression that, in a factory M16, when you select AUTO a cam on the selector interacts with an arm on the auto-sear allowing it rotate into such a position that it can engage the "auto-lug" on the M16 hammer. I still don't follow how the DIAS isn't in the way of that "auto-lug" when SEMI is selected.
With an M16 auto sear, the M16 selector, on auto, holds down the extended tail of the disconnector, and has a relief for the tail of the M16 auto sear to allow it to move and function.
On semi, the M16 sear is pushed out of the way by the selector and becomes stationary, while the disconnector is allowed to move and function.
With a DIAS, the auto sear has no tail and moves and functions 100% of the time, as it is not held back by the selector on semi.
In semi, the disconnector is still holding the hammer when the bolt closes and trips the auto sear, so the hammer doesn't drop until the trigger is reset and pulled again.
Yep
With and M16, on safe, the sear is moved out of the way
With a RDIAS, the sear is always used in semi or full auto, like how a full auto AK is. In semi, when the bolt trips the RDIAS, it releases the hammer but is caught by the disconnector.
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