Does anyone have the O.D and I.D of the barrel nut? My bud has a lathe and mill at home and will mill me out a tool but I need to know the Dim's of the nut to give him a blueprint.

Thanks!
Brett

a piece of 1" thick wall conduit works great

__________________
07/SOT2
NRA Instructor

Pretty dang close to 3/4'' ID PVC. That's what I and others have used. Takes about 5 minutes to make the tool.

Tacticool has them for $22. I bought mine on their Ebay store. $22 to my door. IMHO very reasonable, considering the hourly rate a machine shop charges. If you want dimensions, I can provide them. PM me with a email addy, and I'll send them.

My "machine shop" doesn't charge me anything.... My co-worker has a fully stocked basement with a J Head Bridgeport, lathe, index heads and all sorts of goodies. He will machine me the tool for free all I have to provide is the material if he doesn't have it.

Will 1" Black Pipe work Belt Fed?

Brett. All your answers are in the thread here "15-22 Barrel Nut Tool" Exact measurements of the nut, pics, everything....

Here a link to the first post.

Make Your Own M&P15-22 Barrel Nut Tool - How I Did It - RimfireCentral.com Forums

Phil,

Thanks for the link, I think I read the post but I must not have paid attention to the measurements section. I am going to go re-read the thread and work up a blueprint.

Thanks!

Brett 248 check your email.

Got it!

Thanks!

That's what I drew up this morning. There are a few thou tolerance on depth and width of the lugs just to make sure they fit. I figure 5/10 thou tolerance would be fine here, considering people are making hand filed versions out of PVC and making those work.

I am going 18" deep and I may do a hex on the outside at the end and a 1/2" drive on the end for my torque wrench.

Feel free to use for reference purposes.

*edit* Please note that the image is not 1:1 scale, photo bucket scaled it down from it's original 8.5" x 11" dimensions.

Great info. Will this work on barrels with the flash hider installed by S&W?

I doubt this will clear any flash hider.. I don't have calipers handy to measure the O.D. of a standard Birdcage but my guess is the hider will have to come off as neither the tool, nor the nut will clear them.

I am making a new blueprint and I will upload the file to rapid share so it can be downloaded inch per inch. The document will be accurate to the thousandth and can easily be given to a machinist or just a general document for your own reference when making your own tool.

I need someone to clear up what the Inner Diameter of the Barrel Nut is so that I can reflect this in the blueprint.

The O.D I am basing this off of is 1 Inch 125 thousandths, can someone verify this is indeed the measurement taken at the very end of the nut where the teeth recesses are in the nut (not the undercut of the nut).

Thanks!

My A2 flag hider measures .835" O.D.; it won't fit inside a 1" black pipe. My pipe section measures .810" I.D. My Tacticool socket goes over,but not with the section of black pipe in it. Perhaps a section ofsteel tubing could be welded to the socket, that has a bigger ID, bigger than .850" ID.

The flash hiders thread on for a reason. Un-thread them if you're removing the barrel (I think you have to, to remove the barrel anyway).

Well the figure I am coming up with to machine the inside of the tool is .760 that figure comes from using 1.125 as the Nut O.D and making the teeth of the tool .130 deep and .180 wide. That gives a few thousands of "fudge factor" on the width and depth if the measurements are correct from this thread:Make Your Own M&P15-22 Barrel Nut Tool - How I Did It - RimfireCentral.com Forums

Correction looks like it's 1.01 (must have been looking at the wrong field) I guess this is why I should use CAD instead of GIMP

Looks like you got it pretty close. If you have any troubles when you're done you can use mine. It works great

Attached Images

DSC02099.jpg (16.7 KB, 72 views)

Is that the new "Snaggle Tooth" tool I've heard so much about?

__________________
Stu

its the two tooth trailer park version

Ya'll aren't pickin on my barrel nut tool are ya?

You have to remove the flash hider to remove the barrel from the upper. The forearm end cap is almost tight on the barrel, so there is no way it will fit over the flash hider. The inside diameter of the barrel nut is also smaller than the OD of the flash hider. If you only want to partially dis-assemble your rifle, then you don't need to take off the flash hider and you can make a special tool. The crush washer can be used multiple times, and their cheap.