Magpul states that the CTR uses a friction lock... I was curious to know how it works before pulling the trigger on one.

 

Would you happen to have any photos of the inside of one?

The friction lock on the CTR is the latch that clamps after the stock has been adjusted to whatever length. Here's a relatively short video with a decent demo of how it works (not my video):

 

I haven't messed with a CTR stock, but it seems almost pointless. Seeing how our stocks have to be pinned anyway, if the stock wobbles, that is something that can/should be remedied with or without the friction lock (meaning I don't think it would make much of a difference). Only reason why I would get the CTR over the MOE stock is because it has the QD swivel attachment, otherwise there is no discernible difference as we have to neuter them.

But does it interact with the holes/channel in the stock? Or does it tighten up on the sides somehow?

But does it interact with the holes/channel in the stock? Or does it tighten up on the sides somehow?

 

If you look closely at it, there are 2 teeth (one on each side) that are cut into the main stock that surrounds the buffer tube. When you engage the friction lock, it essentially squeezes these teeth together to form a tighter seal to the buffer tube.

 

Basically it looks somewhat like this:

 

╚¯¯¯╝

 

Those would be the teeth on the outside. they simply get pinched in towards the buffer tube.

Only reason why I would get the CTR over the MOE stock is because it has the QD swivel attachment, otherwise there is no discernible difference as we have to neuter them.

 

A bit off topic to this thread's original intent, but you can add a sling attachment to the MOE if you want to: http://www.weaponevolution.com/forum/showthread.php?2777-MAGPUL-MOE-Stock-Sling-Swivel-Modification (and other methods)

If you look closely at it, there are 2 teeth (one on each side) that are cut into the main stock that surrounds the buffer tube. When you engage the friction lock, it essentially squeezes these teeth together to form a tighter seal to the buffer tube.

 

Basically it looks somewhat like this:

 

╚¯¯¯╝

 

Those would be the teeth on the outside. they simply get pinched in towards the buffer tube.

 

Interesting. Do you happen to have a pic of one?

 

Also, the friction lock works when the stock is in it's shortest position right?

The friction lock on the CTR is the latch that clamps after the stock has been adjusted to whatever length. Here's a relatively short video with a decent demo of how it works (not my video):

 

I haven't messed with a CTR stock, but it seems almost pointless. Seeing how our stocks have to be pinned anyway, if the stock wobbles, that is something that can/should be remedied with or without the friction lock (meaning I don't think it would make much of a difference). Only reason why I would get the CTR over the MOE stock is because it has the QD swivel attachment, otherwise there is no discernible difference as we have to neuter them.

 

I understand that. But I am intent on putting this on a pump action shotgun, not an AR.

Dont currently have a pick, but the whole point of the system is to prevent accidental collapse and rattle/wobble.

The lock doesn't interact with the positioning holes of the extension. It clamps down on the sides of the stock and prevents any movement of the locating pin unless more than passing force is applied to the adjustment lever. The lock does indeed play a role in the CTR locking up better than the MOE. I have demo rifles built with both and the MOEs always wiggle more than the CTRs.