Reviews & Ratings for VISM AR15 Lower Receiver Vice Block — 35 reviews — Page 1

This tool technically does what it claims, but not very well. The first issue is that when you mount your lower, it doesn’t sit perfectly level — it’s angled. While it does hold the buffer tube enough to torque the castle nut, the tube can still shift slightly if you’re not paying close attention, which defeats the main purpose of the jig.

On top of that, you’ll likely find yourself taking everything apart just to double-check alignment, since it’s difficult to verify while it’s mounted. The adjustment screws also leave much to be desired, adding to the frustration.

Overall, this is not a tool I would recommend. Save yourself the headache (and a return label) and look for a better option.

It works as advertised. Plus it is solid. As long as you use it as it is intended it is a great tool to have in your arsenal.

I have not had a chance to use it yet but it appears to be a quality product. And as usual great service and fast shipping from OP

This thing works as advertised everything was square afterwards no more cockeyed buffer tubes.

This really makes it much easier to torque the castle nut and keep proper timing of your buffer tube. Also prevents damage. Staking is much easier as well. Would recommend purchasing if you like to do things with the proper tools.

It is always a struggle to torque the castle nut on an AR. Really needs three hands to hold back on the buffer tube, hold the castle nut wrench in place, and pull on the torque wrench. If you don’t keep the buffer tube aligned it can be damaged by the tooth on the lower receiver’s back plate. At the minimum. You might end up with a buffer tube that’s not clocked right. This tool works well to hold your lower receiver and buffer tube firmly and in alignment so you can torque and stake the castle nut. I did try this with several brands of billet and forged receivers and they all fit fine. Does not require a large amount of torque to secure the buffer tube in the clamp so just snug it up with your fingers. The screw underneath adjusts the height for AR15 or AR10 receivers. Again, doesn’t need to be tight, the slot in the tool holds the buffer tube clamp from rotating and leaves your hands free to operate the torque wrench.

Works great for buffer tube alignment. Locks into lower receiver. Good to install castle nut

I love this tool! It's made removing and installing buffer tubes so easy. I couldn't keep a tube from twisting when I tried to torque it down so I hit the forums and found this tool. I've done several removals and installs with it so far and it makes installing tubes with repeat ease and quality of work a dream.

This tool provides the easiest way to ensure that the buffer extension and the receiver are perfectly aligned. Helps make sure the castle nut is installed to the correct torque by firmly holding the two together in your vice.

It does the job that it is intended to do. Yes, there are other more expensive receiver blocks that probably do a little more and a little
better than this block does. But, for someone that doesn't build 100's or thousands of lowers this works very well.