• Two-piece clamshell design — wraps the upper 360°
  • Fits AR-15 / M4 forged and billet upper receivers
  • Holds the upper rigidly for barrel-nut torque, muzzle-device install, and gas-block pin work
  • Bench-vise clamping surface — pairs with any standard shop vise
  • No pressure on the upper's rail or feed ramps

Full details and secure checkout: https://3crtactical.com/upper-vice-block-2-sections-936/?utm_source=armslist&utm_medium=referral&utm_campaign=listing