Multi-Cal indentification

[Madman]

I have some multi caliber AR15 lowers, if I grab an upper how do I know the caliber since the designation is under the hand guard?

I am going to try this.

Remove the forward assist and chuck it in the lather.

 

[Madman]

Plunge a 7/16" end mill .125" deep.

 

[Madman]

Cut the rim off the caliber shell you want. Install a disabled primer.

 

[Madman]

Glued it in with JB Weld. We'll see if it works when the epoxy drys.

 

[hdgapeach]

I think you've got a winner there. Cool factor is up there, too. A little labor intensive but hey, if you got the tools it's a heck of a "custom" idea.

 

[Dr. Strangelove]

That's slicker than, well, something that's really slick. What an innovative, cool idea! That's something you could sell!

 

[Lilly001]

Neat idea. Looks tacticool.

 

[NCHillbilly]

That's a pretty cool idea for sure!

 

[Madman]

There is back together.

 

[Madman]

I may shoot it with a coat of black alumi-coat. I haven't decided. I'll look at it a while.

 

[JustUs4All]

I love that idea, but what happens when that primer gets struck by something?

 

[nmurph]

Cut the rim off... . Install a disabled primer.

 

[hdgapeach]

My vote is leave it natural brass. The more it ages, the better the patina. That's an awesom idea you've developed. Let me know when you begin production!!

 

[Madman]

I love that idea, but what happens when that primer gets struck by something?

That would get exciting, wouldn't it.

 

[JustUs4All]

Might even help if you needed a little extra forward assist. LOL

 

[Rabun]

That's a great idea!

 

[Madman]

UPDATE

I figured out an easier way to disable the primer. The first one I made, I used a dental pick to dig out the anvil and clean out the cap, what a pain that was.

This time I put the primer in the case (6.5 Creedmoor) and as I cut the rim off it got hot enough to discharge the primer.

 

[Madman]

I finished the 6.5 last night, my wife asked what it is for; I told her it is a last chance round, kind of like a auxiliary fuel tank. When the magazine is empty you can jam in one last round. She rolled her eyes, muttered something and walked out.

 

[hdgapeach]

"She rolled her eyes, muttered something and walked out."

I feel you pain. Reckin both of us done been there, done that, and should've got the T-shirt.........I'm still laughing!

 

[bullethead]

Nice job Madman!!!