I have one on a 3gun rifle build and my only complaint is the weight and cost. Its not what you should look for if you want a lightweight stock. Its super strong for a 6position stock and built well, but that comes with an above average weight. If your R15 has an A2 stock on it then you'll need to get a replacement CARBINE spring and buffer (the carbine-length buffer tube is included with the UBR). Its probably the only 6 position stock I would feel comfortable using as a hammer if required.
Another good aftermarket option is the Luth MBA-1 Stocks. They're more along the lines of the Magpul PRS design (Fixed with an A2 stock kit required) but are lighter weight and lower cost.
Originally Posted By: MasterBlasterYou guys have a nice looking sling set up, tell me about them.Do they hang from the quick release hole in the stock?
MB
Sir,
Sling is a Magpul that has a QD mount that attaches to the stock.
It is easy and quick.
As much as I like how rock solid it is, it's superior cheek weld and the convenience of adjustability, I am replacing it with an A5 RE assembly and a Magpul Fixed Length Carbine stock to lighten the rifle
Originally Posted By: Jacob_HananDo you guys know if David tubbs flatwire buffer spring will fit in the carbine length tube provided with the ubr? And do you have to buy a new buffer?
Sorry to hijack, I'm about to order one too.
How much more do the weigh than a A2?
List of stock weights
It's really close to what the A2 weighs ( UBR= 23.36 oz, A2= 24.5 oz)
I really like my UBR for a particular 3 gun rig that was front heavy due to a CTC MVF-600. The heavy UBR stock balanced things well and like others have said it's 100% rock solid.
A side benefit is it can't really pull your beard like the MOE or CTR.