Tag: threads

.308 DPMS SASS Barrel – Muzzle Threads Removed and Barrel Crowned

I recently came upon a good deal on a DPMS 7.62 SASS Teflon Coated, Fluted Barrel. The problem is I cant have a threaded muzzle in my home state so the threads needed to go.

Rather than send the barrel out to a gunsmith I decided to machine it myself in the lathe at my day job. It was pretty easy and I think it turned out well.

Here’s what I did.

  1. I wrapped the barrel with a precision shim stock perfectly for nearly 360 degrees. This was done to protect the teflon finish from the lathe jaws.
  2. Then I placed the barrel in a 4 jaw chuck. I used the 4 jaw because its the easiest way to get the bore centered.
  3. I indicated the bore and adjusted the chuck until the bore was rotating perfectly centered.
  4. Next step was to remove the threads from the muzzle
  5. After removing the threads I adjusted the tool holder to give me the 11 degree crown.
  6. Cut the crown to a mirror finish

I have read that a brass ball with lapping compound  is typically used to fine hone where the crown meets the bore. I decided to skip this step for now just to see if it matters.

DPMS SASS Barrel 11 Degree Muzzle Crown

DPMS SASS Barrel 11 Degree Muzzle Crown

DPMS SASS Barrel 11 Degree Muzzle Crown

DPMS SASS Barrel 11 Degree Muzzle Crown

DPMS 7.62 SASS Barrel 11 Degree Muzzle Crown

DPMS 7.62 SASS Barrel 11 Degree Muzzle Crown

DPMS 7.62 SASS Barrel 11 Degree Muzzle Crown Final

DPMS 7.62 SASS Barrel 11 Degree Muzzle Crown Final