Well I had researched that and only post more precise info with some trepidation, and with the added note that I certainly would not advocate such modifications, and know that the forum and the members most certainly would not. The links below will however be well known to a lot of people on here and will also educate other members about the legal pre-1961 modification, which is useful general knowledge. Apart from the issue of whether these modifications exist, the links also show the spectrum of variation in internal components used in civilian AR-15s (the bolt carrier in particular) and how vulnerable some variants may be to modification. You will notice that some civilian weapons have a bolt carrier which is very close to the M16/M4 bolt carrier, which gives the lie to the sharp difference claimed in the video between semi-automatic and automatic weapons.
http://www.quarterbore.com/nfa/dias.html
http://www.quarterbore.com/nfa/lightninglink.html
If you still believe that the modification requires access to a machine ship please review the link on one of these pages to the product marketed at one time by a US company that I won't name.
Apart from trying to erect an over-sharp line between between the semi-auto and automatic variants, the officer in the video makes the mistake of equating military with fully automatic and saying this is quite different from the civilian semi-automatic. True there is selective fire on most military weapons but the position is:
M4 - semi automatic and 3-round burst
M16A2 as above
M16A4 - as above
M4A1 - full auto (mainly special forces but due to be phased in for wider use in US military in 2014).
M16A3 - fully auto (US Navy)
Don rightly said that the AR-15 came before the M-16 (certainly not news to me - it was others who said 'based on').
You can find many sources that show that ArmaLite and then Colt always aimed the AR-15 primarily for the military market, though Colt also subsequently tried civilian versions. One indication is that many early Colt AR-15s were stamped, 'Colt ArmaLite AR-15, Property of the US Government, Caliber .223' (See Ezell. E.C. (1990) Small Arms of the World, 12th Revised Edition, pp. 744-75). That in other words was before Colt went into regular M16 production. Notice the .223 above: as we have said before, the weapon was actually chambered for NATO 5.56mm ammunition.
Regarding killing power and the destructive effect of the NATO 5.56 round, this is something that has been widely reported but it is hard to be sure. There was extensive negative publicity about the nature of the wounds suffered by enemy combatants hit by M16s in Vietnam. This was blamed on tumbling due to the slow twist rate of 5.56mm ammunition, but according to others may have been due to bullet construction and fragmentation. In any event this led the US government to classify information from these wound reports until the 1980s.
The point I've been trying to make all along is that UK people will be very familiar with the basic pest control .22 we have here but it does not carry the whack of the .223/5.56mm. That is why the British army bought a modification kit to convert the SA80 (NATO 5.56mm) to .22 so that it could be used safely on ordinary .22 target ranges.
I've emphasised what in your post I am going to refer to.
First in the links you provided in oder to use those devices you either need to purchase M16 Parts such as the Hammer and Carrier/bolt group in order to use the DIAS, need to do some machine work to the Carrier/Bolt group for use with the SWD Auto Connector, and then in both cases you still have to know how to disassemble the lower beyond a normal field-strip as you have to replace trigger and selector lever. Here are a couple quotes from the DIAS
"The M-16 carrier is specifically manufactured so that the lower surface of the carrier trips the sear in a specific location to ensure that the hammer is released at the correct time." "Selective fire with a DIAS is obtained due to the M-16 disconnector and selector."
I don't know much about the available supply of Military Parts on the Civilian market, but needing Military replacement parts to make the DIAS function does not make is a likely choice even for the criminal looking for an easy conversion.
Now here are a couple quotes from the SWD Auto Connector page. "The bottom carrier in the photo above, the M-16 carrier will not work with the link but I have included it on this scan so you can see how the SP-1 carrier was made by cutting down an M-16 carrier. It would be possible to make a SP-1 type carrier from a M-16 carrier
or simply mill an AR-15 carrier to the proper profile." "One complaint I've ever heard about the Lightning Link is that the link converts the firearm to full auto only. This issue was solved by a clever idea that Scott Bell came up with while he was working with John Norrell in about 1990. The solution, which was worked out in a few hours one afternoon,
was to use modified parts from an M16A2 fire control kit to control the mode of operation of the Lightning Link."
As you can see here, both machining and M16A2 replacement parts are needed to make a properly functioning rifle that doesn't simply fire AUTO continuously.
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Please show where the M4A1 and the M16A3 are Full Automatic
Only as your post is implying?
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Yes, Eugene Stoner was hoping to invent a New Rifle that would be accepted by the Military, but neither the AR10 nor the AR15 were.. and before they sold the AR15 Patent to Colt, it was not Commercial Popular, so they fell into financial difficulty. Here is something that for whatever reason, you ignored something or twisted it into what you wanted it to say. Untill the Air Force approached Colt about buying the AR15 in a selectable semi/auto fire abiltiy, they were produced and being sold commercially as a semi-automatic sporting rifle.
http://700rifle.com/ar-15-history-design-field-stripping.php
Maybe you would care to provide a link to credible source material showing that Colts primary desire was to sell them to the Military!
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Next, did you miss in my first post, where when the AR15 was being designed, it says: "Later design efforts produced the AR-15, a semi-automatic rifle chambered for
the smaller 5.56mm round, which is essentially the same as the .223 Remington." Oh, wait a minute, this says both that the AR15 was designed intitially as a semi-auto rifle.. not as a Military Assualt Rifle and that the 5.56 is essentially the same as the .223 Remington. That information was contained in
http://700rifle.com/ar-15-history-design-field-stripping.php and this same site also contains some information about the difference between the .223 and the 5.56. Read it for yourself.
The .223 Remington vs. the 5.56mm NATO Round
The commercial .223 Remington round and the 5.56mm NATO military round are nearly identical, but the 5.56mm case is slightly thicker and the 5.56mm develops higher chamber pressures than the .223.
So, the only difference is that the 5.56 case is thicker, which allows the crimp to hold the bullet tighter, which increases the chamber pressure before the bullet is expelled. <--- this last statement is from presonal reloading experience.
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Three more of your talking points debunked. Maybe you should study the material before you post it and study the material posted before you incorrectly comment on what was posted.