The AR-10 Auto-Connector, the
Lightning link that looks like a Drop in Auto Sear
The Drop In Auto Sear (DIAS), as described on this page,
is a device when used in a semi-automatic AR-15 with M-16 fire control parts
produces full auto fire by catching an M-16 hammer with a sear which is
subsequent released when the carrier slams the sear during it's forward travel.
The Lightning Link, as described on this page,
is a device that works to create automatic fire through the use of a paddle that
releases of the disconnect via a lever action to produce automatic fire.
On this page, I wish to share some photos of a hybrid design that combines
the basic physical shape and interacts with the carrier like an AR-15 Drop In
Auto Sear but function through tripping the disconnect like the SWD Lightning
Link or auto connector. It is the function, an auto-connector that leads
me to refer to this new system as an AR-10 Auto-Connector while it can also be
considered to be an AR-10 Lightning Link. Regardless of the way it looks,
it should be made clear that this is not a Drop In Auto Sear as this does not
function as a sear in any way!
As a background, I have seen two of these AR-10
Auto-Connectors for sale. The first Auto-Connector was
sold as a Post Sample item and the Class 3 NFA dealer that was
selling it was unable or unwilling to provide me with photos of
the AR-10 Auto-Connector beyond a rather crude photo that he had
posted on the web. I spent some time looking into the
AR-10 auto-connector but I was never able to determine who made
it or obtain better photos for the website.
Well. here we are
in September 2003 and I finally managed to find another C-3
dealer that has one of these for sale and this dealer was able
and willing to supply photos of this "Lightning Link" for the
AR-10 as shown below.
Please click any photo
for a larger view.
Quarterbore's Thanks: I wish to
forward my EXTREME thanks to Kevin of
"X-TREME WEAPONS" for
taking these photos for me to share here!
auto-connector as shown above sits inside an AR-10 like a Drop
In Auto Sear would in an AR-10 and the trip as shown above will
work with the AR-10 carrier. When the carrier slams home,
it strikes the rear of the trip which causes the trip to pivot
downward and depress the AR-10 disconnect. As long as the
AR-10 Auto-Connector is properly timed such that the carrier is
just about closed, this will be quite capable of producing
reliable and safe full automatic fire from the AR-10 weapon
The host weapon, the AR-10 in this case, would require
some modifications for this auto-connector to be used as the
AR-10 has a high shelf that would prevent this unit from sitting
in the lower properly and without exact sizes I am not sure if
the lower would also require milling widthwise to accommodate
the devise. Beyond modifications to the lower, the AR-10
carrier would also need to be milled to provide adequate
clearance and a proper contact point to so that the trip is
struck at the proper time to ensure proper functioning of the
weapon system. Neither of these modifications would be
terribly extensive and the host weapon would still be quite
capable of functioning properly in semi-automatic mode when the
devise was removed.
Now, it should be made clear that this item will be
considered to be a machine gun all by itself and this item
clearly falls into the non-transferable category of National
Firearms Act weapons so the only people that can legally one one
of these in the United States is Police and Military units plus
properly licensed individuals that make or sell these to
qualified Military or Police. Just the same, I find this
item extremely interesting and I share these photos and
description here for the educational value this concept points
I would further love to hear from anybody that can advise
who created this system so that I can provide appropriate
credits. I am also not sure if there is any patent or
other legal rights over this design. I am simply sharing
as much as I do know with the hope that someone may be able to
fill in some of the information that I am lacking!