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Anyone who has tried to wrestle an AR10 barrel nut with the upper clamped straight into a vise knows how quickly things can go sideways. The NcSTAR AR10 Upper Receiver Block takes that worry off the table. It supports the receiver from the inside and underneath, so all that torque you're putting on the barrel goes where it should instead of twisting or bending the receiver itself.
The design is refreshingly simple. The upper half of the block slides into the AR10 receiver much like a bolt carrier group would, and the bottom half bolts up to it using the included steel bolts. Together they cradle the inside and bottom of the receiver while leaving the optics rail wide open, which means you can keep a scope or accessories mounted while you work. It's a smarter approach than blocks that just clamp onto the outside of the receiver and risk crushing or scratching the finish.
This thing is more versatile than it looks. You can run just the lower half by pinning it to the upper with the two provided receiver pins for quick clamping during general cleaning and maintenance. Bolt both halves together and you've got full support for the heavy jobs like barrel installs and removals. There's also a hole running the full length of the block that doubles as a bore brush guide, so it earns its keep well beyond barrel work.
Tool options for the AR10, LR308, and AR308 family have always been thinner on the ground than the AR15 world, so having a block made for the 7.62×51 / .308 platform matters. It's cut from blue anodized aluminum, tips the scale around 29 ounces, and measures roughly 8.4 by 3.1 by 2.0 inches. Toss it in your gunsmithing kit and it'll handle build-day duty and routine upkeep for years. The blue body with a contrasting handle also makes it easy to spot in a crowded tool drawer.
It's built for AR10 (7.62×51 / .308) type upper receivers, including LR308 and AR308 pattern uppers. Because the AR10 platform isn't as standardized as the AR15, it's worth confirming your specific receiver before a barrel install. Users have reported success on platforms like ArmaLite AR10 and M5 style uppers, but checking fit with NcSTAR is smart if you're unsure.
From the inside and bottom. The upper half slides into the receiver like a bolt carrier group and the lower half bolts to it, so torque is spread across the receiver internals rather than squeezing the outside. That approach helps avoid crushing or marring the receiver finish during heavy barrel work.
Yes. The two-piece design leaves the receiver's optics rail open, so you can mount or keep accessories in place while the upper is clamped in the vise. That's handy when you're doing maintenance and don't want to strip everything off first.
It is. A hole runs the full length of the block, giving you a straight guide for a bore brush when you're cleaning out the barrel. It means the block pulls double duty for both barrel work and routine cleaning.
| UPC | 848754012654 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | VTHAR10UVB |
| Color | Blue |
| Model | |
| Product Type | Vise Block |
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