NcSTAR VTHAR10UVB AR-10 Upper Receiver Vise Block Set - Blue Anodized Aluminum - VTHAR10UVB - UPC: 848754012654
Product Description
The NcSTAR VTHAR10UVB AR-10 Upper Receiver Block is a dedicated bench tool engineered for secure clamping and support during AR-10 platform maintenance, assembly, and barrel installation. Constructed from high-strength billet aluminum and finished in a distinct blue anodize, this two-piece vise block system interfaces directly with standard AR-10 upper receivers to mitigate rotational force, marring, and stress deformation when applying high torque to barrel nuts or muzzle devices.
Designed to support DPMS-pattern and Armalite-pattern receiver profiles, the system utilizes an internal bolt carrier insert section alongside an external Picatinny rail alignment clamp. The internal insert slides smoothly into the receiver's bolt carrier track to support the upper from within, while the bottom clamping section secures the assembly firmly inside standard bench vise jaws. Included quick-detain pins anchor the receiver through its front pivot and rear takedown pin holes, locking the component solidly in place for precise armorer work.
Whether torquing a new barrel nut to specification, mounting handguard barrel extensions, or replacing stubborn muzzle brakes, the VTHAR10UVB distributes clamping pressure evenly along the receiver length. Its durable anodized aluminum finish resists harsh shop solvents, gun oils, and shop wear, providing long-term service life for home gunsmiths and professional bench armors alike.
*Armorer Bench Notes & Real-World Staging Guidance:
Platform Compatibility Matrix:
• Primary: DPMS-pattern (LR-308) and Armalite-pattern AR-10 stripped or assembled upper receivers.
• Bench Vise Interface: Compatible with standard 4-inch or larger smooth-jaw or padded bench vises.
Bench Setup & Securing Steps:
1. Remove the bolt carrier group and charging handle from the AR-10 upper receiver.
2. Slide the round blue internal insert piece through the rear of the upper receiver into the carrier bore until fully seated.
3. Align the lower support block with the receiver takedown lugs, insert the included alignment pins through the pin holes, and tighten the clamping screws.
4. Secure the assembled blue vise block firmly into your bench vise jaws before applying torque to the barrel nut or muzzle device.
Key Features
- Heavy-duty billet aluminum construction ensures rigidity without warping under high torque.
- Corrosion-resistant blue anodized finish for easy identification on busy armorer benches.
- Two-piece system supports the upper receiver internally and externally to prevent rotational shear.
- Includes quick-detent alignment pins to lock the upper receiver tightly to the tool block.
- Compatible with DPMS LR-308 and Armalite AR-10 style upper receivers.
- Prevents cosmetic marring and structural crushing compared to bare vise jaw contact.
- Simplifies barrel installations, muzzle device torquing, gas block alignments, and handguard builds.
Product Specifications
- Brand: NcSTAR / VISM
- MPN / Model: VTHAR10UVB
- UPC: 848754012654
- Material: Machined Billet Aluminum
- Finish: Anodized Blue
- Platform Fitment: AR-10 / .308 AR Upper Receivers (DPMS & Armalite Pattern)
- Components: Internal Carrier Tube Insert, External Base Block, 2 Alignment Pins, Mounting Hardware
