%20no-repeat%20center%20center;-webkit-background-size:cover;-moz-background-size:cover;-o-background-size:cover;background-size:%20cover; "AR-15 Fitting a Barrel Extension to a barrel")
This video was originally made around 2016. I have completely changed my barreling procedure, but this provides a method that can be used.
This is a full tutorial for machining a barrel to fit an extension to it for an AR-15. The dimensions I used on this barrel have been added to a print on my patreon page. I have tried to go through the process best I could to make it understandable for everyone at any level of experience. If you have any further questions, please don’t hesitate to ask. Also if you have any suggestions for me to improve these videos, please let me know.
Here is a list of links to a few of the parts:
-Barrel Extension:
-PTG Reamer:
-Depth Micrometer:
-Digital 6″ Caliper:
Email Me! precisionmachineshed@gmail.com
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I would like to see a video on how you pin the barrel extension in place so it can never come off after you have successfully done the steps outlined in this video thanks.
Excellent video. I'd like to own a lathe for tinkering with rebarreling. May I ask a few questions? Are you satisfied with the SB Heavy 10 as far as precision, ease of use, etc.? Does it have variable speed? Thank you.
Got a buddy who somehow twisted his barrel loose of the extension when he was trying to crank off his muzzle device, probably not worth fixing when barrels are so cheap these days but would be nice to.
That was frekin awesome. I really appreciate the little details.
Thank you so much for the video. I have some ideas for custom AR15 cartridges that would be much more economical if I could do them myself 😉
Do you know where I could purchase an AR-15 barrel extension with custom external dimensions?
Hi, is it possible to send you a Drill Chuck to test it and feature it in a new video? Our keyless chucks can Drill and Tap, is there an email where I can send you more information of our co. and products? Fodbits is a Chuck manufacturer, thank you
What is the step to pin the extension? Is that required? As that is used as the reference for the gas port as well?
Very cool.
I have a 1903 takeoff barrel with a dewatted chamber in the parts pile, and I've been meaning to turn it into an oddabll .300BLK barrel.
37:03 my GF knows this all too well
I actually didn't know the barrel extension was a separate component.
Looks good Steveñ
I remember a mysterious civilian checking the headspace on the M-16A1 rifles in Basic Training. They never explained why… Even today I never see an AR barrel sold without the extension attached. Now thanks to you, I know how it is done. I think that I will continue to buy the two assembled.
Wow my ar bolt has a sloppy fit
Thank you sir.
Very nice work mister.
New sub. Very interested to see where this goes. Would you be able to do the testing on camera?
One proper carbide insert for 25 off mc master or from MSC is better than 10 eBay inserts that don't work. Just saying. I found the video interesting. Thank you for the time and effort.
I really do need to add a decent, not 1970s Sherline beater hobby, lathe to my shop. So many fun activities!
Very nice. I won a 6mm bartlin blank barrel at a PRS match. I've been thinking about using it to make a 6mm arc barrel from scratch. I know I can buy one, but I own a gunsmith shop in alabama, so why not.
I purchased a Wilson Combat barrel about a year ago in 300 Hamr. Took it out of the box this past weekend to start the build. Upon inspection, it appears they used a stone on a stick to chamber the barrel. Any suggestions on polishing it slightly so the fired case won't stick? Only speculating on the sticking. Only response from the manufacturer is out of warranty.
Video on the finish? Cutting the gas block surfaces and drilling and reaming the gas port? Would also be cool to see a range report vs a pre made ar barrel
"These kinds of videos never get old, truly fascinating!"
Long time follower. My machines are in storage, but I've been reading up and watching a pile of content on chambering and blueprinting rifles. Can't wait to get my lathe and mill up and running again. Thanks for continuing to share your work.
As me and you both know, posting anything public, your subject to criticism…
That threading tool your using….. Not good at all. Those threads are horrible and this being a critical area for the extension holding back pressure, thread geometry is crucial here. Those threads dont look to be engaging much nor will have consistent pitch diameter. Not to mention the extension must be torqued to 100lbs. Not the kind of work I've seen you do in the past.
Also, like you mentioned, using sized brass as a go gauge is a bad idea. You could have rented one from 4D reamers before even approaching this project. After torquing that extension to the appropriate 100 lbs your headspace will change more than you think as well as chamber dimensions. IMO for precision, I would of chambered with the extension already on for this reason.
Cool south bend lathe though
I liked it when you could get oversized extensions from BAT machine. Guess there wasn’t enough call for them or they just got overwhelmed with action.
When chambering a ar barrel the barrel ex extension must be timed with a gas port hole that is drilled into the groove of the rifling
Better to pull out early than to pull out late.
I’m talking about his threads. 😊
Man, you need to work on making a really good m1917 bottom metal. Something like the pre 64 model 70, where it drops down. It really shouldn't be too hard to design, and it shouldn't cost an arm and a leg. If you don't design one, I will..