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Anyone who has tried to hold a slippery aluminum upper receiver in a bare vise knows how quickly that ends in scratched anodizing or a bent gas tube. The Wheeler Delta Series AR-15 Upper Vise Block Clamp solves that headache by cradling your upper in a clamshell-style block that grabs the receiver securely without putting stress on the finish or the flat sides. It clamps into any standard bench vise and gives you a stable platform to actually put some muscle into your work.
This one is dialed in for left- and right-hand Mil-Spec A2 uppers with integral carry handles as well as A3 flattop receivers, so it covers the vast majority of AR-15 builds out there. It shines when you need to torque a barrel nut to spec, break loose a stubborn or over-torqued barrel nut, or thread on a muzzle device. Plenty of folks also use it as a solid perch for cleaning the bore from the muzzle end with a rod, which beats wrestling the rifle on your bench.
The clamp is molded from a high-pressure, solvent-resistant polymer, so the usual bench chemicals like CLP, bore solvent, and degreasers will not eat it up. Inside you get a polymer receiver insert that spreads out clamping pressure and keeps the receiver from being crushed when you really cinch it down.
Here is the feature that gunsmiths appreciate most: the included gas tube alignment pin. When you are installing a barrel and timing the barrel nut, it keeps the gas tube lined up so everything seats where it should. That small touch takes the guesswork out of a step that is easy to get wrong, and it is a big reason this block earns strong marks from people building and maintaining their own rifles.
It is optimized for left- and right-hand Mil-Spec A2 upper receivers with integral carry handles as well as A3 flattop receivers, which covers most standard AR-15 builds. Other AR-15 variants can often be adapted, though you may need to pay attention to any non-standard surfaces or features. If you are running a common 5.56 or .223 upper, you are almost certainly good to go.
Yes, that is one of its main jobs. It holds the upper securely so you can torque a barrel nut to spec or break loose a stubborn, over-torqued one without the receiver twisting in the vise. Many builders pair it with a reaction rod for particularly tight barrel nuts.
No. The clamshell design and the included polymer receiver insert spread out the clamping pressure so the receiver stays protected from twisting, crushing, or marring the finish. That is the whole reason to use a dedicated block instead of clamping bare metal in a vise.
The included alignment pin keeps the gas tube properly lined up while you install a barrel and time the barrel nut. It takes the guesswork out of getting the gas tube seated where it needs to be, which helps avoid alignment issues down the road.
| UPC | 661120564447 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | 156444 |
| Caliber/Gauge | 1 |
| Color | Black |
| Length | 15.0500 |
| Model | |
| Model Fit | Polymer |
| Mount Type | Universal |
| Product Type | Tool |
| Shipping Weight | 1.3375 |
| Units per Box | 1 |
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