M4 sliding stock extension block

aandrews · September 29, 2019, 12:55 PM

Is there a way or a commercial (store-bought) solution for setting an extension-block in the collapsible stock on an M4-style AR-15, so that one can simply extend it all the way to the correct length and not have to hunt for the proper stop?

berettaprofessor · September 29, 2019, 01:24 PM

I don't know of anything commercially, but couldn't one take the collapsible buffer tub, fill in the holes "ahead" of where you want to stop with JBWeld, and then fill in the "groove" behind where you want to stop?

For example, say you want to stop in the 3rd hole of 6. Fill in the first two holes with JBWeld so they're flush with the deepened groove. Then fill in the deepened groove and holes 4, 5, and 6 behind hole three, flush with the circumference of the buffer tube. The stock would stop automatically only in hole 3 but would still be removable if you wanted.

I don't know how JBWeld holds up to firing forces over the long run, but it's worth a try.

MTT TL · September 29, 2019, 02:01 PM

There are many different kinds of stocks out there for AR style rifles. Hundreds at this point. Some have butt pads or some other kind of screwed in extension at the rear. You could remove this and replace it with something longer if you wanted to. Some come adjustable.

stagpanther · October 4, 2019, 07:44 AM

Quote:

s there a way or a commercial (store-bought) solution for setting an extension-block in the collapsible stock on an M4-style AR-15, so that one can simply extend it all the way to the correct length and not have to hunt for the proper stop?

It's called "leave it there."

September 29, 2019, 12:55 PM	#1
aandrews Junior Member Join Date: May 17, 2019 Posts: 4	M4 sliding stock extension block Is there a way or a commercial (store-bought) solution for setting an extension-block in the collapsible stock on an M4-style AR-15, so that one can simply extend it all the way to the correct length and not have to hunt for the proper stop?

September 29, 2019, 02:01 PM	#3
MTT TL Senior Member Join Date: October 21, 2009 Location: Quadling Country Posts: 2,780	There are many different kinds of stocks out there for AR style rifles. Hundreds at this point. Some have butt pads or some other kind of screwed in extension at the rear. You could remove this and replace it with something longer if you wanted to. Some come adjustable. __________________ Thus a man should endeavor to reach this high place of courage with all his heart, and, so trying, never be backward in war.

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September 29, 2019, 01:24 PM	#2
berettaprofessor Senior Member Join Date: November 23, 2008 Posts: 1,091	I don't know of anything commercially, but couldn't one take the collapsible buffer tub, fill in the holes "ahead" of where you want to stop with JBWeld, and then fill in the "groove" behind where you want to stop? For example, say you want to stop in the 3rd hole of 6. Fill in the first two holes with JBWeld so they're flush with the deepened groove. Then fill in the deepened groove and holes 4, 5, and 6 behind hole three, flush with the circumference of the buffer tube. The stock would stop automatically only in hole 3 but would still be removable if you wanted. I don't know how JBWeld holds up to firing forces over the long run, but it's worth a try.