Sigmaco Quad Rail for Type 81 Variant 1 - Review. Sigmacocanada. T81

This rail solves the three deficiencies suffered by the Polytech Quad Rail. 1. Does not disassemble the lower handguard to clean the gas system therefore not disturbing zero. 2. Don't need to remove the Red Dot if it failed because it's partially co-witness. 3. Less weight.

I withdrew my suggestion replacing the 6 screws with oval heads, I couldn't find them in hex and in black.

At this stage, I'm not looking to add cost so I'm not proposing design change. I know some of you dislike the simplicity of its design. My recommendations are minor. 1. Manufacturer's name be added. 2. I would preferred the 6 tiny screws be a bit bigger, I was afraid of stripping them. 3. The barely visible lines at 5 & 7 O'clock could be deepen a bit to give users more grip. 4. Could use a bit more vents to dissipate heat especially when a user could block the Mlok by adding bipod, flash light and laser. 5. Lastly, not so important but the main screw be replaced with hex screw, it's easier to install and I don't need to use locktite if I use locking washer.

Check out my other videos on the SKS, Type 81 and GSG-16, see description in.
SKS:    • DIY SKS Underfolder. How to Hack&Mod. P2. ...  
Type 81:    • DIY AK-47 magazine to fit Type 81. How to ...  
GSG-16:    • Pimp 20 ways GSG-16 without 522 Conversion...  

Disclaimer: this video is for educational purposes only, free of charge. Any part you copied is at your own risk and should be inspected by a professional prior to use.
Due to Youtube's policy. Please do NOT ask for link or post information of where to buy.
Please do not attempt to do my disassembly or mod because it's not made for novices who can't figure out what I'm doing on or off camera also due to the length of the disassembly, I don't often reassemble or include the FCG which is done separately.
If you like what I do on Youtube and you found some parts useful then please support my channel by pressing the LIKE and the subscribing buttons. If it was of no use to you then thanks for watching and please press next. Making videos are time consuming and not to mention expensive to do... Thank you.