Posted 09 June 2011 - 11:34 PM
A friend of mine has just shown me that great photo picturing 1st Cavalry troopers with strange M79s just before deployment in Vietnam.
Do you know what modification was made or what accessory was used here ?
Thank you !
Posted 10 June 2011 - 03:31 AM
Posted 10 June 2011 - 04:31 AM
BTW, the photo is for sale on ebay at the moment.
Posted 10 June 2011 - 04:55 AM
Posted 10 June 2011 - 06:31 AM
Do you know how many prototypes have been build?
Posted 10 June 2011 - 01:12 PM
Posted 10 June 2011 - 01:43 PM
I did not shoot it but as near as I remember it is as you said ("3 round holder moves through the weapon like a solid belt") like a giant harmonica gun.
nguoi tien su
Can you post a link to your auction, if it is acceptable?
Posted 11 June 2011 - 11:50 PM
As noted in the display card in Copdoc's museum photo, the T148E1 pre-dated the M79 and was the preferred design to launch the 40mm grenades developed a few years earlier. They felt the multi-shot launcher would provide superior firepower compared to the single-shot XM-79 and set up an experimental production run to work out the manufacturing bugs. Not sure about the total number produced but recall it was around 300 units.
In testing, the unfortunate flaws of the harmonica feed design were discovered. The constant-force spring used to advance the feed block often failed to correctly locate the chamber for the next round. The gap between feed block and barrel allowed uneven gas venting and velocity variations from round to round. The greatest problem was simply the two big open chambers sticking out the side of the launcher that got fouled with sticks, mud, and other debris when carried in the field. So they were shelved in favor of the simpler single-shot XM79.
The T148E1 still wasn't dead at that point, though. Complaints came in from Vietnam requesting a 40mm launcher with greater firepower than the M79. With several hundred T148E1s in storage, a maintenance manual was quickly printed at Rock Island Arsenal in 1966 and a bunch of them were sent to Vietnam for field testing. Of course, once they got out in the bush, all the old problems came back and were confirmed all over again.
Here's a Vietnam photo of one in use with the 75th Rangers and a few views of the harmonica feed block. As you can see, it's a little more complex than it appears in other photos.
Posted 12 June 2011 - 04:56 AM
Posted 12 June 2011 - 07:59 PM
Posted 21 June 2011 - 07:42 PM
Posted 12 July 2011 - 05:06 PM
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