I just read a great article written by Robert Whitley of www.6mmar.com fame that was posted on the http://accurateshooter.com blog:
Talk about good timing! This post helped me plan the first wave of accurizing activities for the AR-MPR rifle. My goal is to remove any factors that will prevent consistent groups – part of that is related to precision handloading, another part is related to the rifle and related equipment, and finally- shooting techniques and skill. In this post, I’ll outline some plans I have for addressing the second group of concerns listed here.
Let’s walk through the first pass at these accurizing activities:
The AR-MPR currently wears a standard 6-Position collapsible stock. I thought this would be nice for compactness when carrying in the field, and so that it would be easily stowable/storable. I was a bit concerned that this stock would be too wobbly- and it does indeed impose more movement than is acceptable. The answer is to upgrade to a Magpul PRS adjustable stock- this stock was designed for this type of use, so this should help tighten up the back half of the rifle, and afford optimal shooting ergonomics. The flat bottom will be ideal for riding straight back in the rear rest.
One of the simple upgrades that you can make for your accuracy-minded AR-15 is a drop in part called the “Accu-Wedge”. The purpose is simple- take the wobble between the upper and lower units away. No, this wedge does not make the upper “rock-solid” against the lower, but it does help to keep it steady – which translates to keeping your groups tighter!
Front Bench Rest Rider (Custom)
In order to complement the Magpul PRS – I’m planning to machine a custom front bench rest rider. This will clamp onto the bottom rail of the handguard, and will allow the rifle to move straight backwards under recoil rather than “jumping up”. More details to follow on this project!
This project was inspired by the EGW bag-rider (great if you have a round handguard):
These improvements, combined with precision loading and load experimentation should enable me to shoot tighter groups more consistently. My goal is to be able to consistently shoot .5″ 5-shot groups from this rifle off the bench rest.
Anything I’m missing here? Please comment!