Posts Tagged ‘Nikon’

AR-MPR: Mounting Nikon Monarch Scope and M-223 Mount

Thursday, February 10th, 2011

In this post, we’ll look at what’s involved in mounting the Nikon Monarch 6-24 x 50mm riflescope to our AR-15 using the Nikon M-223 scope mount.

Before we get on with the video, let’s take a look at the finished product:

The Nikon Monarch 6-24x50mm Scope and M-223 Mount on the rifle - Image Copyright 2011 Ultimate Reloader

What’s nice here about using the Midwest Industries quad rail handguard, is the “continuous top rail” that it creates which extends the picatinny rail feature on the A3-style upper that we used for the AR-MPR project. This means we can move the scope mount further forward as needed (a good thing when optimizing eye relief for a variety of shooting positions. Here, I’ve measured what will be best for benchrest style shooting.

Here’s the video showing the process:

I plan to sight in this rifle at the range starting at 25 yards, then moving to 100 yards for the initial sight in. Should be fun!

Thanks,
Gavin

AR-MPR – Nikon Optics Overview

Monday, February 7th, 2011

One of the popular sayings amongst video professionals is “Sound is 50% of video”. The point is- many folks focus almost entirely on the picture quality in their videos, and neglect to pay enough attention to getting proper sound in their videos. Why do I mention this here? Well, 50% of a good precision rifle is the scope! It won’t help you to neck turn your brass and hand trickle the powder charge while loading if your scope won’t hold zero! Like many things in life the old adage “you get what you pay for” holds true. That’s not to say that sometimes you pay more for what you get (designer eyewear comes to mind) – but generally you get what you pay for.

When it came time to select optics for the AR-MPR project- I was looking for a few things:

  1. Dependable quality
  2. Value
  3. Capabilities

Time and again I’ve learned the importance of quality tools. Buy it once, and it’ll serve you for a lifetime. You don’t have to pay a fortune for quality, but at the same time, you won’t (but rarely) find quality at “Harbor Freight” prices. The happy medium is often not the highest end, but somewhere in the middle. Finally, I was looking for an optics package that would satisfy the requirements for the types of shooting that I expect to do with the AR-MPR AR-15 rifle (ranging from benchrest style shooting to long-range varminting).

Based on the criteria listed above, and the helpful folks at Nikon (namely Jon LaCorte – a winning competitive shooter) I landed on the Nikon Monarch 6-24 x 50mm riflescope, and the new M-223 scope mount which is purpose built for the AR-15 platform, and the type of shooting (long-range) that I’m going to be performing.

Optics used for AR-MPR - Nikon Monarch 6-24 x 50mm - Click for larger view - Image Copyright 2011 Ultimate Reloader

In the picture above you can see what comes with the Monarch scope package and the M-223 mount:

Nikon Monarch 6-24 x 50mm Riflescope: (1″ tube)

  1. Scope assembly
  2. Thee turret pairs – Small (installed by default), Tall (with tall covers), Large, extra mounting screws
  3. Front and rear caps
  4. Cleaning/Storage cloth (black)
  5. Fog eliminator
  6. Sun shade (tube)
  7. Instructions

Nikon M-223 AR-15 Scope Mount (for 1″ tube)

  1. Mount (with clamp for picatinny rail)
  2. Allen keys for scope clamp and picatinny rail clamp
  3. Instructions

I really like the way that you can replace the turrets quickly, while you maintain your zero (more on that to come). It is evident that this is a quality unit, and it comes with a great standard list of accessories!

Next we’ll mount this scope, level the reticles, and get it zeroed (roughed in – on paper) before we take this rifle to the range to function test and sight in.

Thanks,
Gavin

AR-MPR: Build Part 7 – Lower – Buttstock and Mating Upper Lower

Friday, February 4th, 2011

In this, the final AR-15 assembly video, we’ll walk through the installation of the takedown pin and the buttstock assembly. Finally, we’ll put the upper and lower together for the first time and establish basic functionality (formal function check to follow in subsequent posts).

After all of the planning and work that went into getting this rifle into its proper form, it’s quite exciting to see it come together, and to hold it as if I was at the range, or stalking down a Coyote.

 

 

From the Video- Checking Basic Functioning - Image Copyright 2011 Ultimate Reloader

Next, we’ll take a look at the Nikon Monarch scope that was selected for this project, trick it out, install it on the rifle, level reticles, do a basic sight-in, and then head to the range. Can’t wait!

 

AR-MPR: Build Part 6 – Lower – Trigger Grip and Safety

Saturday, January 29th, 2011

Continuing our way through the lower build steps, in this video, we’ll look at installing the Geissele national match trigger assembly, the trigger guard, the safety selector lever assembly, and the pistol grip.

 

 

Geissele trigger assembly as shown in the Video - Image Copyright 2011 Ultimate Reloader

 

Next, it’s on to the stock and final touches!

Thanks,
Gavin

 

AR-MPR: Build Part 5 – Lower – Magazine Catch Bolt Catch Pivot Pin

Thursday, January 27th, 2011

In this video, we’ll start the assembly of the lower by walking through the installation of the magazine catch, the bolt catch, and the pivot pin. You’ll see a trick for installing the pivot pin that makes use of a dulled razor blade, and a modified section of drill rod.

From the video, in this screenshot we can see the special tool (1/4″ drill rod with flat ground on the side) used in conjunction with the razor blade (with edge dulled for safety) being used to install the pivot pin, spring, and detent. This trick allows you to perform the installation without having to worry about having the spring and detent going across the room (I’ve done that!). Thanks to a friend Tim Hermann for the tip on the razor blade!

Video Screenshot - Homebrew special tools - Installing the Pivot Pin - Image Copyright 2011 Ultimate Reloader

Next, it’ll be on to the trigger group. You won’t want to miss this- we’ll be installing the Geissele Match Rifle Adjustable Trigger.

Have tips you want to share? Please leave a comment!

Thanks,
Gavin