Review: LaRue RISR on an AR15

 

I purchased a used Magpul CTR stock with LaRue RISR and POD installed.  It was interesting to try out the LaRue Reciprocating Inline Stock Riser (RISR) on an AR15.  The RISR is made to give a higher cheekweld on rifles like the LaRue .308 OBR and accommodate the charging handle on the AR series of rifles.

I tried the RISR on a Colt 6920 first.  I found the RISR to be high enough that I could not use the standard iron sights on the 6920.  When I tried another upper with a NightForce 2.5-10×24 in a LT135 high mount.  Even with the scope mounted higher then normal, I found the taller checkweld that the RISR gave made looking through the scope awkward.

Using the RISR gave a little more resistance then charging a normal AR15.  Having an extended charging handle lever would help when using the RISR.

The RISR may be an excellent choice for high mounted optics on the higher rail of a .308 AR.  However for me, the RISR just gets in my way on AR15s.  I have already removed the RISR from my rifle and will be sending it to Shawn so he can try it out.

On Throwlevers

For rifles like the AR15 I prefer to have my optics on quick detach (QD) mounts.  These are useful for a number of reasons including, the ability to quickly remove a damaged optic, quick access to iron sights, and being able to switch optics for different roles.  Accessories also benefit from being QD so I can add and remove bulky bipods, lights, forward grips easily.  The only real downside to quality QD mounts is the price.  For me, the price is easily justifiable when I can take off the Aimpoint from one of my AR15s, and put on an NightForce scope and a bipod, and retaining my previous zero.

For optics mounts, I recommend LaRue Tactical.  Their mounts have worked well for me.  Recently I have been using ADM mounts on my bipods and while I find I have to adjust the mount to fit each rifle’s rail each time I move it, it works well.  I didn’t like the new Surefire throw lever on their newer lights as I would accidentally bump it and it would come loose.  I do not recommend ARMS mounts due to their being either too loose or too tight on various brands of uppers.