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Post by redvonhammer on Jan 5, 2008 23:26:51 GMT -5
Hi all I bring you excellent news! Today I was going to pull up Lifehosts youtube video of the bolt mod, to show it to a buddy. When I came across an entirely NEW and simple way of making ur bolt go forth and back! The person in the video illustrates how simple it is to make ur bolt move forth and back when firing ur CYMA/TM thompson (Yes thats right, this mod works for either!) Using a cloth hanger, plier, drill, marker, and a fishing net! That guy is a genious! Heres the link: www.youtube.com/watch?v=ihk3BHXu4S4Should you need help from him, ask him via youtube or, as he said go to airsoft-barracks.com/forums/ and ask him there! And as a sidenote, if it hadnt been for the fact that my CYMA Thompson has not yet reached me, I would have done lifehosts mod! What a token of luck! Good luck all! RvH |
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Post by schmitty on Jan 7, 2008 11:20:25 GMT -5
I love the simplicity of this modification but I see a lot of potential for things to go wrong. Since the coat hanger rod isn't actually attached to anything it relies on the bolt plates small spring to keep it against the inside of the piston. If someone or something held the bolt handle back while the piston moved forwards the rod could come out of the piston and end up jammed along side it or even in the gears.
It also seems like the rod would be moving dangerously close to the inner parts of the rear sights, If it hit the piston would get stopped halfway back and gears would grind. Since the rod is free to flop around with no guide it seems likely to happen sooner or later.
I'm not knocking the design. I think it is very clever, just a bit risky.
Schmitty
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Post by CharleyNovember on Jan 7, 2008 13:18:21 GMT -5
What about removing the string bit of this mod and bending the rod in a U around and attaching it to the bolt plate? Would seem less floppy? It has been a long time since I had to tear down a Thompson so not sure if there is room inside between the mechbox and the reciever to do that though.
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Post by fido on Jan 7, 2008 15:28:51 GMT -5
yeah but then its fix mounted to the piston...bad idea..
and the bolt cant be pulled back, and if shot in FA it will stay somewhere but not closed
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Post by redvonhammer on Jan 7, 2008 18:18:57 GMT -5
Well, the guy that invented it came into the same thread I made on arnies airsoft forum. And from what he`s telling us, it works pretty much bulletproof. Though he upgraded his gearbox to get more fps, and thus needed metal piston for the m120 spring, he did tell me that his thompson, having, seemingly, fired thousands of rounds, and never failed, the rod never bent. But I guess it is entirely possible to weld a rod guide on the inside clearing of the receiver, with a crack all along it for part of the rod to stick up so you can tie the net to it. But my grandpa always used to say, if it aint broke, dont fix it.
I was thinking something in the lines of sawing of one end of the pin in the rim of a bicycle wheel, and unscrew the other side, and then see if I cant get a hole drilled in the middle of the rear receiver, put some locktite on the rod, and screw it right in. Now, if the gun really should stop at piston back and bolt open (Which they were for real, hence the word, open bolt firing mechanism.) "And also thus being completely impossible from what I know of aegs" the only thing thatl happen is that your gun will fire 2 bullets instead of one. But again, from what I understand, that is a bad idea.
But heres where the simplicity of it all makes it so genious. the rod goes through the spring guide, and with the rod thus staying in the middle, along with a simple trained in check each time you switch magazine (Forexample switching magazines, and then pull bolt back and forth to ensure functionality, and almost looking like a real reload.) I believe this would be a pretty much failsafe design.
And ofcourse, after use, most people dismantle their guns and clean them (I know of no people that does not.) Now while doing so, all you have to do is pull the rod out and be sure it is not bent.
I promised on the Norwegian ww2 airsoft forum that I regularily go to, that I would update them with pics, etc, on the process, as I go through with it. I dont know if I can promise the same thing here, as the file attachment interface is crap.
No offense, but it is really... cumbersome.. in a negative way. And I would have to write links in all bows and directions and register at some over the hill "spam pic buy this and rent that and subscribe to green woods and gold" site. I recently had to reformat my computer and lost 800 gigs of material on other harddrives as well (During startup one morning it starts deleting sectors as a direct result of a virus that I thought was gone after unwantedly acquired through pop ups that I clicked AWAY during my attempt to register at putfile.com .. Seems like my Symantec Anti Virus Corp does not function as well as it used to.. So im not taking any more chances at sites like that with the more or less passive anti virus that I have.
Sincerely Yours
RvH
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Post by CharleyNovember on Jan 7, 2008 19:37:10 GMT -5
No it would be fixed to the bolt plate not the piston. It eliminates the peice of string is all. Not a big deal if what he has works then cool.
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Post by fido on Jan 8, 2008 5:47:57 GMT -5
ok now i got it
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Post by bolt mod on Jan 8, 2008 10:24:31 GMT -5
No it would be fixed to the bolt plate not the piston. It eliminates the peice of string is all. Not a big deal if what he has works then cool. That would mean more weight for the bolt spring to carry for each shot. I`d rather prefer switching a string then trying to find a new bolt return spring. Regards RvH |
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Post by Guinness on Jan 8, 2008 12:52:50 GMT -5
Well, the guy that invented it came into the same thread I made on arnies airsoft forum. And from what he`s telling us, it works pretty much bulletproof. Though he upgraded his gearbox to get more fps, and thus needed metal piston for the m120 spring, he did tell me that his thompson, having, seemingly, fired thousands of rounds, and never failed, the rod never bent. But I guess it is entirely possible to weld a rod guide on the inside clearing of the receiver, with a crack all along it for part of the rod to stick up so you can tie the net to it. But my grandpa always used to say, if it aint broke, dont fix it. I was thinking something in the lines of sawing of one end of the pin in the rim of a bicycle wheel, and unscrew the other side, and then see if I cant get a hole drilled in the middle of the rear receiver, put some locktite on the rod, and screw it right in. Now, if the gun really should stop at piston back and bolt open (Which they were for real, hence the word, open bolt firing mechanism.) "And also thus being completely impossible from what I know of aegs" the only thing thatl happen is that your gun will fire 2 bullets instead of one. But again, from what I understand, that is a bad idea. But heres where the simplicity of it all makes it so genious. the rod goes through the spring guide, and with the rod thus staying in the middle, along with a simple trained in check each time you switch magazine (Forexample switching magazines, and then pull bolt back and forth to ensure functionality, and almost looking like a real reload.) I believe this would be a pretty much failsafe design. And ofcourse, after use, most people dismantle their guns and clean them (I know of no people that does not.) Now while doing so, all you have to do is pull the rod out and be sure it is not bent. I promised on the Norwegian ww2 airsoft forum that I regularily go to, that I would update them with pics, etc, on the process, as I go through with it. I dont know if I can promise the same thing here, as the file attachment interface is crap. No offense, but it is really... cumbersome.. in a negative way. And I would have to write links in all bows and directions and register at some over the hill "spam pic buy this and rent that and subscribe to green woods and gold" site. I recently had to reformat my computer and lost 800 gigs of material on other harddrives as well (During startup one morning it starts deleting sectors as a direct result of a virus that I thought was gone after unwantedly acquired through pop ups that I clicked AWAY during my attempt to register at putfile.com .. Seems like my Symantec Anti Virus Corp does not function as well as it used to.. So im not taking any more chances at sites like that with the more or less passive anti virus that I have. Sincerely Yours RvH I guess I'm confused about how this: [*img]-insert a picture hosted on a image hosting site here-[*/img] is "cumbersome" as it is the universal method of posting images on a forum? (remove '*' from bbcode) Slainte! |
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Post by foxtrot on Jan 30, 2008 0:46:47 GMT -5
Seems to work much better than the origional one too.
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Post by redvonhammer on Feb 8, 2008 12:01:27 GMT -5
Well, the guy that invented it came into the same thread I made on arnies airsoft forum. And from what he`s telling us, it works pretty much bulletproof. Though he upgraded his gearbox to get more fps, and thus needed metal piston for the m120 spring, he did tell me that his thompson, having, seemingly, fired thousands of rounds, and never failed, the rod never bent. But I guess it is entirely possible to weld a rod guide on the inside clearing of the receiver, with a crack all along it for part of the rod to stick up so you can tie the net to it. But my grandpa always used to say, if it aint broke, dont fix it. I was thinking something in the lines of sawing of one end of the pin in the rim of a bicycle wheel, and unscrew the other side, and then see if I cant get a hole drilled in the middle of the rear receiver, put some locktite on the rod, and screw it right in. Now, if the gun really should stop at piston back and bolt open (Which they were for real, hence the word, open bolt firing mechanism.) "And also thus being completely impossible from what I know of aegs" the only thing thatl happen is that your gun will fire 2 bullets instead of one. But again, from what I understand, that is a bad idea. But heres where the simplicity of it all makes it so genious. the rod goes through the spring guide, and with the rod thus staying in the middle, along with a simple trained in check each time you switch magazine (Forexample switching magazines, and then pull bolt back and forth to ensure functionality, and almost looking like a real reload.) I believe this would be a pretty much failsafe design. And ofcourse, after use, most people dismantle their guns and clean them (I know of no people that does not.) Now while doing so, all you have to do is pull the rod out and be sure it is not bent. I promised on the Norwegian ww2 airsoft forum that I regularily go to, that I would update them with pics, etc, on the process, as I go through with it. I dont know if I can promise the same thing here, as the file attachment interface is crap. No offense, but it is really... cumbersome.. in a negative way. And I would have to write links in all bows and directions and register at some over the hill "spam pic buy this and rent that and subscribe to green woods and gold" site. I recently had to reformat my computer and lost 800 gigs of material on other harddrives as well (During startup one morning it starts deleting sectors as a direct result of a virus that I thought was gone after unwantedly acquired through pop ups that I clicked AWAY during my attempt to register at putfile.com .. Seems like my Symantec Anti Virus Corp does not function as well as it used to.. So im not taking any more chances at sites like that with the more or less passive anti virus that I have. Sincerely Yours RvH I guess I'm confused about how this: [*img]-insert a picture hosted on a image hosting site here-[*/img] is "cumbersome" as it is the universal method of posting images on a forum? (remove '*' from bbcode) Slainte!I tried that, but all I got was that exact test, not any pictures. So I just wrote the direct links to the photos instead. I donno what it is with this site and my computer. But I generally have problems posting pics and other things like changing color of my text, checking PM inbox (I am left with a white window some times.) and such. I am still working on my gearbox, I lost that small key for the smallest allen screws on the selector switches, so I have not done the necessary repairs yet. (As I put the gun back together after I did the mod.) I should have known that opening up a gearbox for the first time is not a good idea unless I`m in a completely empty and white room  (Repairs being missing right side bearing for middle gear.) That said, I am going to the post office to pick the parts up now (I think, together with the Systema Turbo Motor, small allen keys comes with it.) S! RvH |
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Young Blood
Corporal
Dog Co. 504 PIR, 82nd Airborne (SoCal)
Posts: 876
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Post by Young Blood on Feb 11, 2008 3:19:04 GMT -5
Im gonna try this to my old thompson, ill see if it messes up after a few games and let you guys know, thx for sharing!!
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Post by fido on May 2, 2008 6:33:38 GMT -5
i did this to my tm tommy and it works pretty good
but i used a spoke of my bike....
wish i had found his thread when i did the mod...i knew it had to be somewhere around here..
anyway..that was so simple i did it from what i had remembered
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(Repairs being missing right side bearing for middle gear.) That said, I am going to the post office to pick the parts up now (I think, together with the Systema Turbo Motor, small allen keys comes with it.)
