Magpul UBR stock for precision work?

[bm11]

I am at the beginning stages of building my SPR. This won't be a spec build, more of a personal preference build.

I like the look of the UBR stock, and I see a lot of guys using it, but how is it with a rear bag? I think I am probably going to end up going with a PRS stock because of that factor, but I didn't want to rule out the UBR without asking.

 

[salmonaxe]

Re: Magpul UBR stock for precision work?

I am of the opinion that the PRS Stock is about the most useless AR stock that magpul offers. I have one on my AR-10T and here are my observations.

In order for it to work with the charging handle, the cheekpiece is too far back to make it practical to actually use. Then the LOP adjustment is basically the same length closed as an A2 stock and then only adjusts around 1-1.5" longer. The buttstock hook is way too far forward. I just was plain disappointed with the PRS stock. In the end I prefer a standard A2. I think one would be better served getting an A1 stock and fitting it with an adjustable buttplate.

In regards to the UBR. It's BADASS. Quick adjustable LOP and rock solid. Goes from very short to quite long. (I think longer than an A2) Forward and rear flushcups. Storage. It also has a nice flare to the cheekpiece for better cheekweld. I like the raked angle of the bottom of the stock much better than the PRS, it sorta reminds me of the A2. There are raised portions on the covers of the compartment that aid in holding the stock up into the shoulder. The rear portion works fine with a bag. Usually I use more of a pillow type bag, but I've also used it with a redman bag. I feel that the UBR is a very well thought out and put together design.

I've had this UBR stock for as long as one could have one. It's a preproduction version that I got as part of some replacement plan that magpul was doing for broken M93 stocks. It locks up just as tight as the day I got it.

 

[ORD]

Re: Magpul UBR stock for precision work?

There are plenty of people running the UBR stocks on "precision" rifles, but in my experience, I don't think it is the best option on the market.

If you want or need a "collapsible" stock, then the UBR is the one to get because of the fixed, proprietary buffer tube that gives you a consistent cheek weld throughout the range of LOP adjustment and a solid lock up when the stock is extended throughout the range of LOP adjustment. BUT, depending on the optics you plan to mount, the UBR may not offer you a high enough comb to give you an optimum cheek weld.

Now, assuming that the stock fits your needs otherwise, it can be used with a rear bag (or a monopod with a proper adapter...saw one not long ago but I'm not sure if they are in production or not). There is enough surface area on the flat of the rearward portion of the stock (the 2" or so between the molded sling loop and the buttplate) to permit a bag to cradle the stock nicely.

For a true "precision" AR, I much prefer the PRS. It is solid as a rock, heavy (ok...not that heavy, but depending on how long a barrel you go with, it helps balance the rifle nicely), offers an excellent amount of adjustment for comb height and LOP (for a fixed rifle-length stock), and can generally be had for a little cheaper than the UBR.

 

[bm11]

Re: Magpul UBR stock for precision work?

Ah, two totally different opinions!

This will require some though.

Thanks guys,

-Bob

 

[ORD]

Re: Magpul UBR stock for precision work?

I don't think that Salmonaxe and I have different opinions, but just different preferences. I think that we both agree the UBR is an EXCELLENT product and one of Magpul's best achievements to date. I just personally prefer the PRS for precision rifle use while he doesn't like it.

Same "preference" differences you'll find with people who love AICS setups and those who hate them with every fiber of their being!

To each their own. Thankfully, because of companies like Magpul, we get a choice!

Like I tell people all the time who are considering different stocks, scopes, etc...the best thing you can do is get the stock in your hands or get behind one at the range, shop, etc. and see which is the best "fit" for you and your particular needs.

ETA: regardless of which you go with first...the results will be great. Option one, you buy the UBR and fall in love with it. Problem solved, moving on. Worst case scenario, you buy the UBR and hate it, so you sell it, along with the carbine buffer and spring, and buy a PRS, A2 tube, rifle buffer and spring and you either brake even or you actually come out ahead. WIN/WIN!!!

 

[salmonaxe]

Re: Magpul UBR stock for precision work?

Yeah, it's just my opinion of it the stock. The real thing is to get behind each stock and try them out. Body shape and shooting styles will dictate what stock works best. That's why tried to detail what did and didn't work for me.

Recently I built another SPR type rifle with a fixed A2 stock. I haven't shot it yet, so I haven't been able to really see if the adjustability of my UBR is something I'll miss.

I don't know if you noticed in my picture, but I have mounted my optic VERY low. Larue's SPR-S mount allows for a very low mounted optic. This helps reduce the need for a cheekpiece.

 

[Falar]

Re: Magpul UBR stock for precision work?

I'm with Salmonaxe 100% on this. I bought into the hype and made the mistake of buying a PRS for my AR10 at first too. I immediately went back to the A2 for all of the same reasons and then got a UBR when they came out. IMO the PRS is only good for one thing, weight. MOst everyone else is probably buying it just because it looks cool or is made by magpul and is advertised as being for precision rifles.

 

[Adician]

Re: Magpul UBR stock for precision work?

UBR is .2 pounds lighter than the PRS for all you harping on weight.

With that being said I like the PRS because at shortest length it fits my shoulder perfectly. The cheek weld is great too, which you will need to have your optic higher if you're going to run BUIS on your rifle.

They both have their place, I prefer UBR for 16 inch guns, PRS for 18-20, they just seem to work better that way. (for comparison I like ACS on 13-14.5 and CTR on anything shorter unless it has a suppressor)

 

[Falar]

Re: Magpul UBR stock for precision work?

The weight is the main redeeming factor for the PRS. With long barrels with heavy profiles you need all you can at the rear of rifle to try and balance it out. I wasn't trying to say the weight was a negative.

 

[salmonaxe]

Re: Magpul UBR stock for precision work?

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Adician</div><div class="ubbcode-body">which you will need to have your optic higher if you're going to run BUIS on your rifle. </div></div>

I run my optics very low using the Larue SPR-S mount and I'm able to use the troy BUIS without issue with a multitude of scopes.

 

[Adician]

Re: Magpul UBR stock for precision work?

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Salmonaxe</div><div class="ubbcode-body"><div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Adician</div><div class="ubbcode-body">which you will need to have your optic higher if you're going to run BUIS on your rifle. </div></div>

I run my optics very low using the Larue SPR-S mount and I'm able to use the troy BUIS without issue with a multitude of scopes. </div></div>

SPR-S isn't low, I mean low as in <span style="text-decoration: line-through">objective</span> bell less than 1/4 inch off the rail. Not hard to do with low rings and a USO ST-10 or similar, the Larue are all great at keeping the scope high enough to use. If it works, then no biggie. I'm not arguing, just saying what I know.

EDIT; meant the eyepiece, my bad.

Nice setup by the way Salmon Axe, thanks for sharing. You are correct in this regard.

 

[sobrbiker883]

Re: Magpul UBR stock for precision work?

If your natural comfortable position has your head on the rear half of the stock, go PRS, if the forward half, the UBR will do.

I like the UBR better than the PRS, but call me silly, I prefer an A2, esp if it has an adjustable buttpad.....just not nearly as tacticool.