I recently bought a AIAE 6.5 Creedmoor with a RD Precision MRAD muzzle brake. The OD measures .960" while the ID measures .290". Threaded 5/8-24 tpi. Only used for 20 round of PRIME ammo. In perfect condition. Asking price is $107 shipped via USPS flat rate box. Payment via USPS MO or Paypal F&F. Posted elsewhere and sold to first "I'll take it" or PM timestamp.