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dZ · December 17, 1999, 01:15 PM

JP engineering web page says this: http://jpar15.com/barrels.htm
The 1x9 version is threaded 5/8x28 and contoured .875 from the gas block to muzzle for a nearly seamless match to the stainless bull barrel version of the JP recoil eliminator. (This is a post ban legal thread pattern which does not require the brake to be permanently attached on a post ban gun.) If you prefer nothing at the muzzle, thread protectors are available or you may opt for a plain crowned muzzle or Intra-Comp. Contour making this barrel compatible with any other barrel nut. No modifications needed.

December 17, 1999, 01:15 PM	#6
dZ Senior Member Join Date: May 31, 1999 Location: Exiled, Fetid Swamp, DC Posts: 7,548	JP engineering web page says this: http://jpar15.com/barrels.htm The 1x9 version is threaded 5/8x28 and contoured .875 from the gas block to muzzle for a nearly seamless match to the stainless bull barrel version of the JP recoil eliminator. (This is a post ban legal thread pattern which does not require the brake to be permanently attached on a post ban gun.) If you prefer nothing at the muzzle, thread protectors are available or you may opt for a plain crowned muzzle or Intra-Comp. Contour making this barrel compatible with any other barrel nut. No modifications needed.