I haven't seen any sort of announcement on that, but I have some in my cart.

What's the deal?

The 0000 Very Thin Grease is awesome, and we are finishing up a video of Bill explaining all about it! Coming soon!

Well, so far you folks haven't made anything *not* awesome, so it's gonna be ordered tonight.

Don't know what it does but I ordered a bottle. Can't wait to find out what I just bought

Can HQ provide some differentiation between Very Thin Grease and regular Go-Juice? Why and where would I want to use one over the other?

VTG for sears and rails. Basically anywhere lubrication needs to stay put.

-Geissele Customer Service

Would it be appropriate for a barrel nut?

Aeroshell 33MS is appropriate for a barrel nut. Honestly, I see no reason not to buy a tiny tub of it for 1/3 the price of the G-grease and be using the correct product for said part. However, people were using Froglube on the barrel nut a few years ago when that mess was all the rage, and I have yet to hear of one imploding because of it.

Any lubricant will work just fine for installation of a barrel nut, because you are just trying to keep the barrel nut from galling the receiver threads. VFG can be used, but you should not think of it as grease, but more like a thick oil. Great for use anywhere on the gun, but especially where you do not want your oil to migrate. Example, when you lube your carry gun, the oil will migrate out, and get on your hands, holster, shirt, ect, so you need to wipe it down several time before it stops. Using 0000 VFG, the lube will not tend to migrate, stopping the mess.

Now, where you actually want the oil to migrate, pivot pins, spring wells, ect, then Go Juice works great. Hope that helps a little.

While you are likely correct, functionally, mechanically this is not sound.

Torque is a very poor way to gauge thread tension. It's akin to gauging air/fuel ratio optimization on a carburetor car just by looking at 1/4 track mile mph and et changes. Yeah, it's kind of meaningful...but not really. We use torque because for most application, strain gauges are not necessary and cost a lot.

This is where K factor comes in. You can apply the same torque to a dry screw as a screw lubed with mineral oil as a screw lubed with an EP type product. The resulting thread tension will be radically different for all. Torque specs need to also specify thread lubrication and type of lube. Most specs assume "light machine oil", but some are speced dry, while still others, are very lube specific.

The milspec barrel nut thread tension was established using torque values for steel on anodized aluminum,  lubed with Aeroshell 33 with moly.

While I doubt "it matters", it truly does make a huge difference in actual thread tension/strain, what the parts are lubed with.

The other reason for the lube speced, was galvanic corrosion potential inhibition.

Hmmmm....that's interesting.  Can you point me to the mil spec torque requirements and the use of the Aeroshell?

ARMY TM 9-1005-319-23&P states that barrel nut torque shall be no less than 30 lb, nor any greater than 80, and explains in several sections that molybdenum disulfide grease is to be used on the barrel nut and upper thread interface. Aeroshell 33MS is in compliance with specification MIL-G-21164D as defines a " GREASE, MOLYBDENUM DISULFIDE, FOR LOW AND HIGH TEMPERATURES, NATO CODE NUMBER G-353 (8 DEC 1981)".

 You are 100% correct in your statement. I am an aircraft mechanic by day, hence the PropDoc handle, and understand completely. However, with a torque spec range of 30ftlb to 80ftlb, does it really matter, no? The idea of the lube on the barrel nut is anti-gall, not meeting a torque spec. Any lube that keeps "electrolyte" out of the threads will inhibit galvanic corrosion.

 Trust me when i say here, i am not trying to engage in an argument about this, because your statements are true and i am only responding to show my reasoning. Through experience, i can tell you that ALG VFG will work just fine on your threads. If you choose not to use it, that works for me too, as long as anyone reading this understands, you need to lube the the threads of the upper receiver when installing the barrel nut.

I thought so. It does not specify Aeroshell, just a moly grease. And I'll have to second PropDoc. With a torque spec that wide any lube will work especially to achieve the 30 ft-lb min

Depends on the K factor. 30 ft-lb with Moly Disulfide vs. 30 ft-lb with Mobil 1 synthetic 5-30 motor oil will place a very different amount of strain on the threads. Will it functionally matter? Maybe. Maybe not. If it does, it will likely only matter near the bottom of the torque spec if using anything other than moly grease, as the tension will likely be less. I just do what the FM/TM says and call it good.