The Joke that is the Type 81 Rail

I don't mind the mount, and I haven't seen any of the issues others have reported but it does look very similar to the Ali mount. I recognize there was development costs for the safety and rail but it does seem a bit disingenuous if that's what happened.

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sidemount.jpg
 
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Tactical Imports said:
-Replacement trigger and hammer pins precision manufactured in USA of grade 8.8 steel
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Umm... grade 8.8 steel. This is not a real thing. There is a Grade 8.8 fastener standard under ASTM F568M. A grade 8.8 fastener has to be made of Medium carbon steel; quenched and tempered. It also would have to be a threaded fastener with a hexagonal head or be a socket head cap screw or a graded threaded stud. There is no such thing as a grade 8.8 steel pin.

Perhaps your supplier gave you bad specification data? Presumably these pins are actually made of 1045 medium carbon steel, or possibly 4140 alloyed cro-moly steel?

Just saying... at least be accurate when posting specs to enthusiasts...
 
Claven2 said:
Umm... grade 8.8 steel. This is not a real thing. There is a Grade 8.8 fastener standard under ASTM F568M. A grade 8.8 fastener has to be made of Medium carbon steel; quenched and tempered. It also would have to be a threaded fastener with a hexagonal head or be a socket head cap screw or a graded threaded stud. There is no such thing as a grade 8.8 steel pin.

Perhaps your supplier gave you bad specification data? Presumably these pins are actually made of 1045 medium carbon steel, or possibly 4140 alloyed cro-moly steel?

Just saying... at least be accurate when posting specs to enthusiasts...
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Correct, grade 8.8 is a fastener standard for steel hardware.

SOCKET MOUNT SCREW M5 W/6MMTHREAD & 5MM SHAFT PER PRINT 8.8 BLACK OXIDE
SOCKET MOUNT SCREW M6 W/6MMTHREAD & 6MM SHAFT PER PRINT 8.8 BLACK OXIDE

Material: Medium carbon steel, quenched and tempered
Proof Load (MPa): 580
Min. Yield Strength (MPa): 640
Min. Tensile Strength (MPa): 800
 
YouTuber Gnutzguy just published a video comparing the no drilling mount to a drilled mount originally buses on a VZ-58. He does have some concerns regarding the sideways can't from the mounting plate and how the no drill mount may have the pins unscrew with use.

He also describes how to test fit the parts and pre adjust the mount clip tensi outside the rifle, before installing the parts in the rifle.


Gnutzguy said:
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Ustauk said:
YouTuber Gnutzguy just published a video comparing the no drilling mount to a drilled mount originally buses on a VZ-58. He does have some concerns regarding the sideways can't from the mounting plate and how the no drill mount may have the pins unscrew with use.

He also describes how to test fit the parts and pre adjust the mount clip tensi outside the rifle, before installing the parts in the rifle.
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Securing the pins with blue locktight would prevent loosening.
 
svt1940 said:
Securing the pins with blue locktight would prevent loosening.
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He actually suggested that in the video. He postulated that while Loctite-ing the screws represented an acceptable civilian solution, that the possibility of the pins becoming undone is why this was never implemented in military optic mounting solution in similar firearms.
 
Can anyone confirm the dimensions of the rail itself? I don't have my calipers with me, but it seems to deviate from the picatinny standard I've seen on other mounts/rifles. Specifically the datum sits higher than it should be.

No clue if I'm misunderstanding something or got a bad mount.
 
I ordered both optic and sight. I'm content with it, but seeing i could have gotten the kobra, which looks better and functions better in many ways, for the same price was a kick in the nuts for me.
 
FYI from another thread:

Tactical Imports said:
Adapter plates are different, they are made specifically for each and not interchangeable. That being said you could just keep either Picatinny or Kobra attached to the adpater plate and just screw on/off :)
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I don't know if TI will sell the Kobra plate without the adapter, but if they do it may allow use of other a Eastern bloc arm mounted optics that do not fit the mounting rail for the Picatinny mount.
 
Had my T81 lmg w/side rail out at a service rifle match this weekend. Definitely had to apply a lot of elevation to get this thing zeroed. I was thinking I might bottom out the elevation adjustment but I didn't in the end. I'm not sure how much is left but there probably isn't much.

The match was interesting - definitely a challenge taking 7.62x39 out to 500m in windy conditions. With a rough 500m zero, I managed 16/20 scoring hits and 18 on the screen at 500 with some copper washed Russian surplus. Definitely a more capable rifle with glass on top.
 
DaveMachine said:
Had my T81 lmg w/side rail out at a service rifle match this weekend. Definitely had to apply a lot of elevation to get this thing zeroed. I was thinking I might bottom out the elevation adjustment but I didn't in the end. I'm not sure how much is left but there probably isn't much.

The match was interesting - definitely a challenge taking 7.62x39 out to 500m in windy conditions. With a rough 500m zero, I managed 16/20 scoring hits and 18 on the screen at 500 with some copper washed Russian surplus. Definitely a more capable rifle with glass on top.
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Sweet! Have you shot an M10X, and would you say the accuracy is comparable with an optic on the Type 81?
 
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