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Posted: 4/18/2015 6:05:58 PM EDT
[#1]
They look very close. The main questio iI have is that the td415 upper compatible with metric parts from hk?
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Posted: 4/18/2015 6:42:46 PM EDT
[#2]
Can you put the German rail on the Td416 and take a pic for
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Posted: 4/18/2015 7:06:41 PM EDT
[#3]
The TD rail fits and is 30 thousandths taller. You can see the small step up in the video when I put the TD hand guard on the HK upper.
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Posted: 4/18/2015 7:07:59 PM EDT
[#4]
The HK rail would be a step down 30 thousandths from the TD upper rail.
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Posted: 4/18/2015 7:10:39 PM EDT
[#5]
Quote HistoryQuoted:
They look very close. The main questio iI have is that the td415 upper compatible with metric parts from hk? Piston drive rod works, complete bolt carrier works. Hand guard fits on securely but is offset height wise by .030". |
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Posted: 4/18/2015 7:52:34 PM EDT
[#6]
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Posted: 4/18/2015 8:22:45 PM EDT
[#7]
I am more worried about the key notch fitting in the receiver. If there is .030 hight difference does that Carry over to the receiver hey hight.
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Posted: 4/18/2015 8:36:20 PM EDT
[#8]
Quote HistoryQuoted:
I am more worried about the key notch fitting in the receiver. If there is .030 hight difference does that Carry over to the receiver hey hight. Yes, the receiver height difference would carry over. The rails are interchangeable, they are secure but .030" offset in height. |
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Posted: 4/19/2015 6:13:21 PM EDT
[#9]
Quote HistoryQuoted: Yes, the receiver height difference would carry over. The rails are interchangeable, they are secure but .030" offset in height. Quote HistoryQuoted: Quoted: I am more worried about the key notch fitting in the receiver. If there is .030 hight difference does that Carry over to the receiver hey hight. Yes, the receiver height difference would carry over. The rails are interchangeable, they are secure but .030" offset in height. How much trouble would it be to just mill a bit off the rail |
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Posted: 4/19/2015 7:06:05 PM EDT
[#10]
The rail would be useless at that point to mount anything to it.
Been talking to some old friends and hopefully came up with a rail that would work and have the correct height. My upper will be here Thursday and rail should be here soon. I will keep updating my findings. |
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Posted: 4/19/2015 7:08:04 PM EDT
[#11]
Hey mbell did you change out the piston when you did the gab? Or did you go hk piston with rings
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Posted: 4/19/2015 8:16:52 PM EDT
[#12]
Quote HistoryQuoted:
Hey mbell did you change out the piston when you did the gab? Or did you go hk piston with rings When I put the HK vented Gas Block on the 14" Titan Defense upper that is in the video on the SJC Titan compensator, I used the Titan Defense piston cup with the HK gas block. The TD piston cup does NOT use rings. You can see in the video that the entire body of the TD piston cup is slightly larger than the HK one. I measure the difference in the video linked in my OP. The inside diameter of the cylinder in the gas block is the same. HK uses gas rings to seal the gas and TD uses a slightly larger diameter piston cup to seal the gas. I was ready to change the piston cup to an HK one if this did not work, but this combination runs very well. |
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Posted: 4/20/2015 9:48:48 PM EDT
[#13]
https://youtu.be/mEAs_HIcNSY
The video is in HD so you can freeze frame to see details. Here are some shots from the video showing the differences under the rails. In the second picture you can see the .030" difference in height. The hand guards fit tight and lock up well but there will be the mismatch in height up or down depending on which way you go. 
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Posted: 6/23/2015 6:30:22 PM EDT
[#14]
Thanks for the vid. Good stuff there! I wasnt too familiar with Titan before the vid.
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Posted: 7/4/2015 12:10:29 PM EDT
[#15]
Mbell, what brand rail covers do you have on the built rifle laying on the bench in those photos?
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Posted: 7/5/2015 12:00:45 PM EDT
[#16]
Quote HistoryQuoted:
Mbell, what brand rail covers do you have on the built rifle laying on the bench in those photos? The rails are German HK 416 rail covers. https://youtu.be/mEAs_HIcNSY |
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Posted: 7/5/2015 10:47:09 PM EDT
[#17]
Quote HistoryQuoted:
The rails are German HK 416 rail covers. Quote HistoryQuoted:
Quoted:
Mbell, what brand rail covers do you have on the built rifle laying on the bench in those photos? The rails are German HK 416 rail covers. Awesome! I watched your video a couple of times when deciding whether to do an HK clone build and failed to notice the "HK" mark on the covers. Thank you! |
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