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View Full Version : What are these proprietary slots used for?


camoman
01-29-23, 07:57
[url=https://postimg.cc/yk6tjVmW]https://i.postimg.cc/jdyTs2C6/76-A52631-F7-FA-46-AA-8-B98-ECAC51-F14033.jpg
titsonritz
01-29-23, 11:37
Why don't you email MI directly?
jsbhike
02-04-23, 07:13
[url=https://postimg.cc/yk6tjVmW]https://i.postimg.cc/jdyTs2C6/76-A52631-F7-FA-46-AA-8-B98-ECAC51-F14033.jpg

Can't recall if I contacted MI or PSA(I think both have sold rails with a similar cut) to ask if it was keymod(since the product description did not mention it) and the response was it was just part of the manufacturing process.
Midwest Industries
03-08-23, 10:08
[url=https://postimg.cc/yk6tjVmW]https://i.postimg.cc/jdyTs2C6/76-A52631-F7-FA-46-AA-8-B98-ECAC51-F14033.jpg

Those holes in the slot allowed the use of the QD socket in the rail that was included with the handguard if you mounted the rail on the bottom. Without the hole some QDs would hit the handguard.
HKGuns
03-08-23, 10:20
Mystery solved! Thanks. There was an entire other thread full of speculation on those things. :)
titsonritz
03-09-23, 22:12
Mystery solved! Thanks. There was an entire other thread full of speculation on those things. :)

For reference:
https://www.m4carbine.net/showthread.php?238958-Is-this-a-Keymod-slot