I think the UBR is just too damn heavy. Unjustifiable weight. Am I alone on this?
WAY to heavy.
Moved because this isn’t a technical question.
Heavy is good for balancing certain rifles, but in general, I agree (and I think the cheekweld blows).
I think it depends entirely on the rifle and it’s use. I don’t have the cheek weld problem and I use one on a more precision style AR. It’s not made for the “Lightweight Rifle of the Week”. 
I’m with wetilderjr on this.
I have one on my 3-gun rifle and it balances the Noveske SPR barrel and whatever optic I am running at any given time very well.
I prefer the weight of it over the PRS, though I would probably be singing a diffferent tune if I was doing precision long-range shooting.
To me, stocks do more than just connect the rifle to my shoulder.
They can be used to balance the weight distribution, which I find to be more important to me than the overall weight.
That being said, I only own one and I don’t see myself getting any more now that the A5 RE is out and that there are lower cost options for the SOPMOD.
I’ve got a Recce rifle with a UBR stock and NF 1-4x24.
Is it “too heavy”? I don’t think so. Would it be something I’d want to carry for 16 hrs a day? Probably not.
It does balance well with 16 and 18" barrels.
I got a UBR to balance out my 14.5" middy with an AAC M42000 and provide a decent cheekweld for my TA31 ACOG.
It does that nicely, but I wouldn’t put it on anything else.
I guess I’m a little crazy then…
I have UBR’s on all 6 of my 7 AR’s and love everything about the stock… Well maybe not the weight but I like everything else about it enough to ignore the weight differential. I do not have to hump 10 lb rifles around 16 hours a day though but for me is the stock I choose for my AR’s…
JC
I have one on my 14.5 BCM and love it. Yes it is a bit heavy but the weight doesn’t bother me. I’ve looked at lighter stocks and keep coming back to the UBR. I’m planning on putting one on my 10.5" SBR to counter the weight of a M4 2000 up front.
It’s too heavy for light guns, but anything with a medium contour or heavier barrel and/or variable zoom optics, it fits great.
For lighter guns, my ACS and EMOD stocks are better counterweights, which restricts my UBR use to longer precision rifles, but I never found fault with the weight, though I do wish a lighter version was simple enough to do.
I installed a UBR on my SBR because I live the way it balances out the rifle. But after my tennis elbow got worse (thanks tot he crappy ergonomics of my cubicle at work) I had no choice but to remove it and replace it with a regular receiver extension and a CTR.
It now lives on my “SPR” rifle. I still like the UBR, but compared tot he CTR it is a bit heavier. Am I sorry I ever used one? No. DId I think it was too heavy? Not at all. Even with CTRs or MOEs my tennis elbow is still a hindrance and probably always will be.
It balances out my BCM 12.5 Kino nicely. Not a great stock for a lightweight setup, but for SPR and other front heavy builds it is good to go.
To heavy and busy.
I was thinking of getting one for my Colt 6940 because it always feels a little front heavy to me, but I worry about adding more total weight to the rifle.
You aren’t alone, you just have an opinion based on your own needs. Others have different needs and uses, and think differently.
I have a lower with the UBR stock installed and one with the CTR. I also have two uppers; one is a 20 inch precision, the other a 16" carbine.
The weight difference between the CTR and the UBR is noticeable. Both uppers feel lighter and livelier with the CTR. The change in center of gravity isn’t enough to be noticeable, even with the precision upper with it’s HBar profile barrel. Cheek weld with the UBR stock is much better and I like it’s longer length of pull when fully extended. (I have even added the thicker recoil pads to both stocks.)
The A2 fixed stock is simpler than the UBR and probably lighter. But I like being able to adjust the length of pull on my rifle when wearing a heavy jacket or just a t-shirt and the UBR is as solid as a hammer.
In my experience, the CTR is lighter and the change in balance with the UBR isn’t enough to justify the extra weight. But the comfort and solidness of the UBR over the CTR is
I share your opinion. I was originally going to go with the UBR stock when I built my SPR, but as an interim I put on an A2 stock I had laying around. Since my rifle is running a BCM 18 in a V-Tac forend, it isn’t particularly front heavy and the A2 stock balanced it well enough. Comparing the A2 stock and the UBR side by side, the extra weight of the UBR is very noticeable. I still really like the adjustable length of pull of the UBR, but at this point I don’t see the extra weight and cost to be justifiable for my needs.
I put the “It helps balance the rife” argument to a BTDT type, and he just said: “Why would you want to make your weapon heavier?”
I think the design is excellent, but it is just too heavy. I bought one myself and was impressed with its execution, but once on the rifle it was obviously “wrong” (for me), as it turns what is supposed to be a lightweight weapon into an over-heavy piece, for a limited increase in functionality…I put a CTR on instead, and am quite happy with it.
I put ubr’s on my 2 ton sig556ER and my 3 ton dpms 20" .308. I don’t really notice any weight difference.