Rifle build for NRA AR Tactical class

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Nature Boy

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I have an Armalite M4 that wasn’t getting any love so I decided to build an upper to compete in the NRA’s new Tactical(AR) class.

The specifics can be found on the web, but basically it’s a new category that shoots in High Power Rifle along with the sling shooters and F Class guys. The pertinent rules include:

1. AR type rifle using calibers from .223 through .308
2. Barrel not to exceed 20”
3. Weight not to exceed 14lbs
4. If using a scope, magnification not to exceed 15X
5. Harris or Atlas type bipod or sling. No F Class bipods or front rest. Rear support of the “field expedient” type. No eared bags.
6. Trigger weight no less than 4 1/2
7. Standard 10/20/30 round mags

All other prone, slow fire High Power rules apply, like single loading, not from the magazine.

This new class will shoot on the 600 yard service rifle target, 1 MOA X Ring, 2 MOA 10 Ring, etc, not the reduced F Class target

I wanted to try and control my costs so starting with my Armalite lower I decided to stick with .223 with a Wylde chambered Proof carbon barrel (yep, there went my “control costs” goal). To defray the cost of the barrel I used an Anderson upper and kept the Armalite BCG. I also repurposed my Atlas bipod, Stoner scope mount and a Leupold LRT 4.5-14X50 The only other purchased items were a Sampson Evolution hand guard and a Rise Armament 4.5 lb trigger. I still spent more than I had planned.

A481D7DF-EE07-425C-9BA5-F0B8DE209A3C.jpeg

I’ve been sorting and prepping brass this weekend with the goal of doing a barrel break-in and maybe shoot some load development but time has run out.

I’ve got a plan though. I’m going to be using Lake City brass (LC14 and LC15 is what I have the most of). I sorted and processed ~400 cases so that should be enough for now.

I’m going to be trying the new Berger 85 LRHTs with VV N140 and BR4 primers. I found the distance to the lands using this bullet and will start -0.020 off.

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I’ll post my progress here as I go along

Edit: typo on max scope magnification. Max is 15X
 
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I made it to the range this weekend and quickly realized as I was shooting some barrel break-in rounds that I'm going to need some practice in order to be consistent with this configuration.

First issue is I've haven't shot an AR platform rifle in earnest in 5-ish years and I couldn't get in a comfortable, repeatable shooting position. My beard kept getting caught in the junction between the buffer tube and stock which proved to be an annoying and often painful experience. While adequate for a carbine, the grip feels too small for target work and my thumb doesn't know where to go. Most of these things can be fixed.

The biggest issue however is the trigger. The 4 1/2 lb minimum as prescribed by the rules is a challenge considering all of the target rifles I shoot are 6-8 oz. Swapping out the now too small grip will probably help get better with the trigger mechanics.

The bottom line though is I just need to load up a bunch of ammo and go spend a few hours at the range. Once I get re-aquatinted with the rifle in it's new form, then I can turn my focus on load development. There a 2 day match on the 3rd and 4th and I'd love to have things sorted out by then.
 
@Nature Boy - I feel ya’, brother! The AR-15 is so inundating that folks forget just how difficult it really is to shoot. I love shooting AR’s, but I give myself plenty of forgiveness to ensure I don’t end up either pulling my hair out or bashing my face against a wall (or that of someone else) whenever I’m trying to shoot long or small with AR’s!
 
4.5 and up is pretty heavy, I think the only competition firearms I have with trigger pulls that high are revolvers being fired double action. Also lucky enough to be the right size and build to prefer fixed stocks to adjustable, most of the time.
 
Nature Boy said:
I made it to the range this weekend and quickly realized as I was shooting some barrel break-in rounds that I'm going to need some practice in order to be consistent with this configuration.

First issue is I've haven't shot an AR platform rifle in earnest in 5-ish years and I couldn't get in a comfortable, repeatable shooting position. My beard kept getting caught in the junction between the buffer tube and stock which proved to be an annoying and often painful experience. While adequate for a carbine, the grip feels too small for target work and my thumb doesn't know where to go. Most of these things can be fixed.

A comment, a question and another comment.

First, what a fun build with a great purpose. Second, why not a Magpul PRS stock? I have those on my POF P308 and Busmaster/Bergara "precision" ARs. You'll have an adjustable cheek piece that won't pull on your beard, as well as adjustable LOP. Finally, ARs are completely different animals in the DMR/precision role compared to bolt action rifles, even with an excellent Geiselle or similar trigger. The follow through is very different, as is the recoil impulse. I always find that there's more finesse required with AR precision rifles compared to bolt action rifles.
 
why not a Magpul PRS stock?

Well, there’s rule 3.3.3.a, which sounds like the your Magpul suggestion might comply with. I’ll have to investigate that. (More money, but what’s new, right?)


Stock – Must be of the type and design commonly issued to and/or used by U.S. Military or U.S. Police; may be straight (solid), folding, or collapsible; competitive style stocks such as those commonly found on Match Rifles, Palma Rifles, and F-Class Rifles are prohibited. Tactical stocks with an adjustable cheek piece and/or an adjustable butt plate are permitted. Tactical rail and/or equipment attachment system are permitted. Tactical adjustable stocks fitted with rear monopods are permitted but the rear monopod may not be used for support
 
That’s a surprise to me - I haven’t followed the rule book changes for a couple of years now, but I really didn’t expect allowance of adjustable cheekpieces. Nice to see though, honestly.

If Service Rifle rules were as generous a decade ago as they are now - as progressive - I would have been a lot more likely to stick with it. With this class now, I’m ALMOST intrigued enough to go back occasionally. Maybe once my boy gets big enough to manage this kind of competition, since it would still be a few years before he can really run a PRS match smoothly.
 
Nature Boy said:
Well, there’s rule 3.3.3.a, which sounds like the your Magpul suggestion might comply with. I’ll have to investigate that. (More money, but what’s new, right?)

Sounds like the PRS stock complies with the rule. The AR15 and AR308 stocks have different length cheek risers with the AR308 version being shorter to allow for the longer BCG/charging handle. This allows you to run the 308 version on an AR15 if you want. I think you'll much prefer the PRS stock over any other type of stock. They add some weight but you're well under the 14lb requirement so not a concern. I've had a couple of them for 12+ years and they're the GEN1 variants. Magpul is now on GEN3.

PRS® GEN3 Precision-Adjustable Stock (magpul.com)
 
Nature Boy said:
They’re proud of it, aren’t they? Looks like what I need though so I’m going to order one.

You won't be disappointed. It looks like they've done away with the AR308 specific model so that makes ordering easy. The adjustability of the stock to the shooter and the rigidity make it worth the price of admission.
 
Do you have to single load those Berger bullets? I used to shoot the 77gr SMK in F-Class matches and bought a few thousand 80gr A-MAX bullets many years ago (that I still have) but had to single load due to the magazine length limitation.
 
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All High Power matches are single load, this new division included. The COAL using these new Bergers would certainly preclude using a mag to feed
 
Nature Boy said:
All High Power matches are single load, this new division included. The COAL using these new Bergers would certainly preclude using a mag to feed

We used to shoot a lot of matches on a Marine Corps base alongside Service Rifle shooters running ARs, M1As, and Garrands but we shot at F-Class targets and had to follow their magazine change rules.
 
The biggest issue however is the trigger. The 4 1/2 lb minimum as prescribed by the rules is a challenge considering all of the target rifles I shoot are 6-8 oz. Swapping out the now too small grip will probably help get better with the trigger mechanics.

I see that the Rise Armament trigger is single stage. Many two stage triggers can be/are set up to take up most of the weight in the first stage with a second stage on the order of 1 1/2 #. If you're used to ounces it might take some practice but it's better than 4 1/2 all at once. Geissele is probably the most popular now.
 
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