The NCStar AR-15 Upper Receiver Vise Block (brand part no. VTARUVB) is designed to fit AR15/M4-pattern upper receivers so you can clamp them securely for assembly and maintenance. Made by NCStar, it lets you install or remove barrels, handguards, and muzzle devices without stressing the receiver or relying on hand strength alone. It’s a straightforward accessory for anyone building or servicing an AR15 upper at the bench.

Key Specifications

• It’s machined to fit AR15/M4 upper receivers specifically, so it seats securely instead of rocking in a general-purpose vise.
• The block is built from anodized aluminum, which won’t mar the receiver the way bare steel jaws would.
• It’s intended for barrel and handguard installation, giving you the leverage a torque wrench needs without the upper twisting.
• It also supports general maintenance tasks like muzzle device swaps where the upper needs to stay locked in place.

Frequently Asked Questions

Will this block work with an AR10 upper too? No, this block is sized for the AR15/M4 upper receiver; NCStar sells a separate AR10 version for the larger platform.

Does clamping the receiver in this block risk cracking it? The block is designed specifically to hold the upper receiver’s geometry so vise pressure is distributed evenly, rather than pinching a single point.

Buy the NCStar AR-15 Upper Receiver Vise Block

A dedicated upper receiver block turns a two-person barrel job into something you can do solo at the bench. Order it from our Lubbock, Texas gun shop for fast, direct shipping, and browse our full gunsmithing tools selection.