BLR takedown barrel nit

New BLR takedown barrel nut.   Lets you change calibers with you takedown in the same bolt head range.   These fit 308 bolt head.   So 7-08, 6.5 CM, 243, 6CM, 22 ARC, 22CM, 25CM, 6GT, yada yada.   You get the picture.  Will not fit the 30-06 rcvrs.  

These are VERY DIFFICULT to find anyone making them.   Only two smiths in the world that I could find info about.  Browning does not sell these or give out any info.    
Get smiths to make new barrel to stock takedown dimensions at chamber end, add this barrel nut on the  end, and you have a quick caliber change BLR takedown rifle. 
I was going to do a 450 bushmaster barrel. 

Have video of it working I could send.  I don’t do YouTube or such, so no links.  

I have 2 pcs.   $475 each shipped.  You buy both at $900 I’ll ship no extra cost to you.