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HKG41 build, need some G3 dimensions/pics


DFM56

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I randomly got the idea to attempt a G41 conversion after seeing it removed from the clone vote thread for some arbitrary reason, so I'm looking into the feasability of said mod. I just need a few dimensions that I can compare with my m4 to see how hard it would be to mate the lower receivers. 

 

I need:

 

Width of G3 lower reciver (preferably an A4 lower, since I would base to mod off of that if funds permit, but a stock sg-1 lower would be good as well)

 

pictures of the end of the g3 reciever without the stock on, from a variety of angles

 

pictures of the hand guard removed

 

My general plan is:

 

Replace fire selector with mp5 parts 

 

carve a wooden stock and coat with fiberglass for dent resistance. sand and paint. Reason for this is that the shape of the g41 stock is much differant than the g3 stock, and making a new one would be just as easy as chopping the old. 

 

shape pistol grip to remove thumb rests, making it look more like a more modern mp5 lower. remake trigger guard. 

 

Chop magwell off of upper and replace with m4 magwell. Add m4 hop-up unit. will probably need to extend nozzle and work on air seal. I'll also work on the joint between the upper and lower to make it look more g41-like.

 

I'll also need to make a forward assist and dust cover. Debating on whether it would be easier to shape a block of balsa and fiberglass it or make it out of some abs sheet. I would love to actually make the FA work like the ICS m-series AEGs, I'll have to look into the mechanism.

 

As for the foregrip, I would actually love to make an HK79 to get my grenadier fix. Even if it doesn't work, it would still be awesome.

 

 

 

I'm actually very familiar with the g41 externals. In my spare time, I make 3d models for video game mods and such, and my latest was a G41 "TGS" (I know that it technically doesn't exist, but it sounds bad-*albatross* :D)

 

pics or it didn't happen? ;)

 

http://www.fpsbanana.com/models/screens/14...odels/1431a.jpg

 

so, if anyone has ideas, throw them out! this is all up in the air, so I'll take all of the help I can get. 

 

 

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I've got Jing Gong T3K3/G3 A3.

The width of lower receiver is 2.5 cm. It is measured with standard measuring tape. So if anyone got more accurated measure, you should believe him.

 

Some pictures

 

The end of receiver:

 

Left side

http://www.uplo4d.com/viewe/557048504g3006.jpg

http://www.uplo4d.com/viewe/605476580g3017.jpg

 

Right side

http://www.uplo4d.com/viewe/903933686g3008.jpg

http://www.uplo4d.com/viewe/154414552g3016.jpg

 

Behind

http://www.uplo4d.com/viewe/1205764261g3007.jpg

http://www.uplo4d.com/viewe/1177633860g3009.jpg

http://www.uplo4d.com/viewe/632392687g3015.jpg

 

Upside

http://www.uplo4d.com/viewe/108256353g3014.jpg

 

The part which supports the stock:

 

Right side

http://www.uplo4d.com/viewe/253208216g3010.jpg

 

Left side

http://www.uplo4d.com/viewe/408523143g3012.jpg

 

Behind

http://www.uplo4d.com/viewe/276669105g3013.jpg

 

Pics without grip:

 

Right side

http://www.uplo4d.com/viewe/305668627g3018.jpg

 

Left side

http://www.uplo4d.com/viewe/723367269g3019.jpg

 

Behind

http://www.uplo4d.com/viewe/317510633g3020.jpg

 

Below

http://www.uplo4d.com/viewe/644980557g3021.jpg

 

Pictures without handguard:

 

Right side

http://www.uplo4d.com/viewe/1186375329g3026.jpg

http://www.uplo4d.com/viewe/1191288660g3027.jpg

http://www.uplo4d.com/viewe/688117550g3028.jpg

http://www.uplo4d.com/viewe/1333121237g3029.jpg

 

Left side

http://www.uplo4d.com/viewe/1251796045g3030.jpg

http://www.uplo4d.com/viewe/952622708g3031.jpg

http://www.uplo4d.com/viewe/1330448127g3032.jpg

http://www.uplo4d.com/viewe/1112019045g3033.jpg

 

Below

http://www.uplo4d.com/viewe/663273696g3034.jpg

http://www.uplo4d.com/viewe/151901683g3035.jpg

http://www.uplo4d.com/viewe/513003903g3036.jpg

 

I hope those help you with your project. ;)

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Helpful post is helpful  :)

 

cheer for the pictures, They're going to be a huge help when I get around to this project! Hopefully before the summer is over, but I'm not sure if my bank will be able to take the hit for a while  :rolleyes:

 

 

 

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Its like a STANAG HK33...

 

 

Would starting with a HK33 and then just modding the magwell a little bit be simpler for you?

True, completely forgot about the '33.... 

 

 

it is much closer, but also much more expensive :unsure:  guess it all comes down to how hard it's going to be to mod the receiver when both the '33 upper and m4 lower will be metal, compared to modding a plastic JG. Also, the CA hk33 front ends are quite weak, aren't they? I'm not sure if I would want to hang an hk79 off of one. If I went that route it would definately need to wait until next summer... 

 

 

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With regards to cost you could base it on a BE Hk33 clone, I have one and the reciever is quite nice (the rest of the gun however was painted with thick yellow paint so i dont know if it was originally nice or not), although it is metal which presents loads of difficulties when fusing it with an M4 reciever which is how i assume you were planning to do it.

 

I never fired mine before it was taken apart and the reciever used in another project, but i dont think the internals are worth much either from what i saw, the JG would almost definately have better internals. Depends on whether you were planning on using the stock internals from your base gun or completely rebuilding the inside i guess

 

 

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With regards to cost you could base it on a BE Hk33 clone, I have one and the reciever is quite nice (the rest of the gun however was painted with thick yellow paint so i dont know if it was originally nice or not), although it is metal which presents loads of difficulties when fusing it with an M4 reciever which is how i assume you were planning to do it.

 

I never fired mine before it was taken apart and the reciever used in another project, but i dont think the internals are worth much either from what i saw, the JG would almost definately have better internals. Depends on whether you were planning on using the stock internals from your base gun or completely rebuilding the inside i guess

 

Valid point, I'll probably be doing enough work to justify refinishing at least the upper, so the paint won't bother me. Also, I have a variety of v2 boxes I can drop in so internals won't be a problem, unless the hop-up chamber is really shoddy  <_< Isn't the receiver a clamshell though? 

EDIT: ###### it has an SEF lower <_<

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Don't worry so much about the lower reciever and pistol grip. On the CA33 (which I'm assuming the BE is based on) it can be switched with a Marui compatible MP5 lower with only very minor mods. I did it on mine: link.

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Don't worry so much about the lower reciever and pistol grip. On the CA33 (which I'm assuming the BE is based on) it can be switched with a Marui compatible MP5 lower with only very minor mods. I did it on mine: link.

 

You just saved me so much work, thank's mate!

 

 

Still in the process of trying to fund this (it keeps getting more expensive, I thought all I needed was a jg g3 and an m4 hop-up,now I need a few differant guns that I may or may not be able to sell if I can even replace the parts I took from them <_< ), but hopefully I'll be able to do it. Also considering a mag-k, would definately be cheaper, probably easier, but not as awesome.

 

ohh well, I'll hit up some boneyards to find the 33 and mp5, since I'll be replacing the internals anyway. 

 

 

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I tried to make a G41 in airsoft and leared a lot about dremeling, sanding and abs welding. In the long run I ended up with something pretty close, but my brother had specific desires for the gun (I was building it for him), so the gun ended up different, but very satisfying. So this is a doable project, but you HAVE TO have a clear picture of what you are doing before you ever take dremel to gun. Anyways where is what I ended up with:

 

CLICK TO SEE LEFT PROFILE

CLICK TO SEE RIGHT PROFILE

CLICK TO SEE SELECTOR AREA CLOSE UP

 

My brother really wanted a gun shorter than the conventional G41, so we used an MP5 body and MP5 stock instead of the CA33 or a G3. This is a really good thing in the end. The G3 body we had was really giving me problems getting the magazine and the hop up to mate. In addition the MP5 body shortens the gun (something my brother wanted from the start anyways) and allows the use of various MP5 stocks available on the market. In addition he likes the look and feel of the G3SG1 style grip, but wanted that sorter too, so I did that. (Now he really wants an RIS, so I will likely be modding it to have that eventually.) Lastly he REALLY wanted the gun to have a unique smooth profile. Prior to this request I was going to try to replicate the G41 magwell with plastiboard and attach it to the MP5 grip/selector group. I actually fused an M733 to the MP5 trigger group with bondo and ABS weld instead. While not strictly a G41 anymore he REALLY likes it. I really enjoyed the project, but it really wasn't as much of a G41 as I know I am capable of. Still my brother is the one that wanted it, so I made what he wanted.

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I tried to make a G41 in airsoft and leared a lot about dremeling, sanding and abs welding. In the long run I ended up with something pretty close, but my brother had specific desires for the gun (I was building it for him), so the gun ended up different, but very satisfying. So this is a doable project, but you HAVE TO have a clear picture of what you are doing before you ever take dremel to gun. Anyways where is what I ended up with:

 

CLICK TO SEE LEFT PROFILE

CLICK TO SEE RIGHT PROFILE

CLICK TO SEE SELECTOR AREA CLOSE UP

 

My brother really wanted a gun shorter than the conventional G41, so we used an MP5 body and MP5 stock instead of the CA33 or a G3. This is a really good thing in the end. The G3 body we had was really giving me problems getting the magazine and the hop up to mate. In addition the MP5 body shortens the gun (something my brother wanted from the start anyways) and allows the use of various MP5 stocks available on the market. In addition he likes the look and feel of the G3SG1 style grip, but wanted that sorter too, so I did that. (Now he really wants an RIS, so I will likely be modding it to have that eventually.) Lastly he REALLY wanted the gun to have a unique smooth profile. Prior to this request I was going to try to replicate the G41 magwell with plastiboard and attach it to the MP5 grip/selector group. I actually fused an M733 to the MP5 trigger group with bondo and ABS weld instead. While not strictly a G41 anymore he REALLY likes it. I really enjoyed the project, but it really wasn't as much of a G41 as I know I am capable of. Still my brother is the one that wanted it, so I made what he wanted.

 

 

Nice work, though, I would like to see a fullsized version myself :D

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I tried to make a G41 in airsoft and leared a lot about dremeling, sanding and abs welding. In the long run I ended up with something pretty close, but my brother had specific desires for the gun (I was building it for him), so the gun ended up different, but very satisfying. So this is a doable project, but you HAVE TO have a clear picture of what you are doing before you ever take dremel to gun. Anyways where is what I ended up with:

 

CLICK TO SEE LEFT PROFILE

CLICK TO SEE RIGHT PROFILE

CLICK TO SEE SELECTOR AREA CLOSE UP

 

My brother really wanted a gun shorter than the conventional G41, so we used an MP5 body and MP5 stock instead of the CA33 or a G3. This is a really good thing in the end. The G3 body we had was really giving me problems getting the magazine and the hop up to mate. In addition the MP5 body shortens the gun (something my brother wanted from the start anyways) and allows the use of various MP5 stocks available on the market. In addition he likes the look and feel of the G3SG1 style grip, but wanted that sorter too, so I did that. (Now he really wants an RIS, so I will likely be modding it to have that eventually.) Lastly he REALLY wanted the gun to have a unique smooth profile. Prior to this request I was going to try to replicate the G41 magwell with plastiboard and attach it to the MP5 grip/selector group. I actually fused an M733 to the MP5 trigger group with bondo and ABS weld instead. While not strictly a G41 anymore he REALLY likes it. I really enjoyed the project, but it really wasn't as much of a G41 as I know I am capable of. Still my brother is the one that wanted it, so I made what he wanted.

Thanks mate, you just gave me a really good idea :)

 

I'll just build the magwell out of abs or steel sheet depending on what upper I go with.

 

 

that saves me from buying and m4 lower at least  :D

 

 

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