Which Magpul PRS do I need for my LaRue OBR?

AR/M4 Beyond 5.56/.223
1

I have an OBR that I am currently using with a SOPMOD collapsible stock but want to add a PRS. Which PRS model is this, the AR15 or the SR25/AR10 type? I assume it is the SR25/AR10 type.

Thanks!

2

YES You will need the AR10 / SR25 model.

It has been noted that the AR15 model, the cheek pad, interferes with the length of pull for the AR-10 charging handle.

3

Note that he only difference between the two, AR15, and AR10, is the length of the cheek piece. You can use an AR10 model on an AR15, for example.

4

Thanks guys!

5

I’m not sure that’s the only difference between the two. I had an AR15 PRS on a DPMS .308 and the bolt would not lock back until I got the correct AR10 PRS and the charing handle was not impeded on the way back so I don’t think that was the issue.

6

That was exactly the issue – you cannot pull the charging handle back far enough on the 308 guns with the AR15 PRS. If you look at the way the PRS works, it has 0 effect on the system, except for impeding the charging handle so that you do not get a long enough pull. It slides over your buffer tube, just like an A2 stock. There is nothing about the stock that has a direct effect on the bolt.