Drain Holes in Rx Extensions....

[Razorhunter]

Can anyone tell me what the TDP says about this? I've always thought the Milspec buffer tubes/Rx Ext's were supposed to have drain holes located in the bottom, which were supposed to be drilled in the middle of each hole used for the positioning of the collapsible stock. Is this correct? My LMT Rx Ext has three of these holes, which I THOUGHT were drain holes.
However, my Colt 6920 does NOT have these three drain holes. There IS one hole drilled in the END of the tube, but I think that is where the tube was machined, or held by a fixture during the machining process?? Possibly turned on a lathe?
Anyhow, does anyone know about these drain holes, and where they are supposed to be located? Is this whole "drain hole" issue indeed a thing of reality, or do they even exist??? It seemed odd that my LMT would have them, but my Colt doesn't???

[CDDM416]

I checked the tube on my CD M4, just the one hole in thee end.

[Iraqgunz]

Paul,

I looked at some of the Colt M4's down the road and they all have the little drain hole at the end of the lower receiver ext. As far as I know that is the only drain hole. I have never seen a Milspec tube with drain holes in the bottom where the recess cuts are for the shoulder pin for the actually sliding buttstock. And yes the hole at the end is a drain hole. If you look at an M16A2 buttstock you will see that there is also a hole as well, it just a little different.

Originally Posted by Paul Cataldo

Can anyone tell me what the TDP says about this? I've always thought the Milspec buffer tubes/Rx Ext's were supposed to have drain holes located in the bottom, which were supposed to be drilled in the middle of each hole used for the positioning of the collapsible stock. Is this correct? My LMT Rx Ext has three of these holes, which I THOUGHT were drain holes.
However, my Colt 6920 does NOT have these three drain holes. There IS one hole drilled in the END of the tube, but I think that is where the tube was machined, or held by a fixture during the machining process?? Possibly turned on a lathe?
Anyhow, does anyone know about these drain holes, and where they are supposed to be located? Is this whole "drain hole" issue indeed a thing of reality, or do they even exist??? It seemed odd that my LMT would have them, but my Colt doesn't???

[tiger seven]

I was under the impression that the three additional drain holes in the bottom was an exclusive LMT thing. I've never seen them on a mil-spec RE that wasn't made by LMT.

Perhaps LMT's relationship with Crane and NSW has something to do with it. Just a guess...

Derek

[Razorhunter]

Thanks for checking that IraqGunz,
I think our assumptions are correct. The Colt's and many others have the single hole in the END of the Rx Ext.
The LMT's have THREE ADDITIONAL HOLES in the BOTTOM, directly in the center of the larger stock adjustment holes.
Thanks for confirming things for me guys.