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Grendel noob builds an AR
#1
I am a Grendel noob but FAR from an AR noob, I've built plenty! I am new to the Grendel and I will chronicle the build here. I ask for patience only because it's still winter here in NY and before assembly I need to apply some Cerakote which requires a nice warm day. As a Grendel noob I assume I will make Grendel based mistakes along the way. I welcome constructive criticism but I won't reply to bullies or trolls. As far as AR based mistakes go, I do how I do so those are probably not mistakes. I build on a budget and get parts that are on sale or from places I have dealt with in the past and have found to be quality made. Many AR snobs would be very humbled if they saw just how small the supplier/forge house list actually is and which big name rifle makers gets their stuff from where.

Politics aside the build will be as follows:

Platform: AR15
I love the standard AR15 mostly because of it familiarity for me as a former soldier and accessory availability, it's the Chevy 350 of the gun world

Barrel: BCA 20" Bull/Heavy 1:8 twist 5R, threaded muzzle, rifle length gas system. Muzzle brake with blast cup threaded on
switched out the 18" mid gas after getting advise here about issues with that length

Upper: Side charger from BCA
Usually I don't like straying away from the original design. Mainly due to training aspects with muscle memory in mind. This includes ambi controls and the like, but as soon as I saw the side charger from Bear Creek and how beefy it was I loved it! Knowing I'd put a tactical scope of at least 10x on it, it made even more sense.

Lower: Anderson AM15 lower from my local shop
This lower was actually from a 300BLK build in which I changed it out for a naked aluminum one I purchased and Cerakoted. Only because it was one less component to take apart, degrease, blast and paint. Plus hey another lower

Receiver extension: Mil/Spec tube with carbine buffer
This may change as far as using the carbine buffer. I've researched this and found no issues using it.

Stock: Strike Industries Viper fixed in FDE
Love the concept, price and simplicity. A long range rifle is better suited with a fixed stock, I feel, and this one looks pretty cool. Plus it's cheaper than the Magpul and the reviews were pretty good. I can adjust it to me and there are some accessories that can be added later. I'm known to change out stocks so this may also change

Grip: UTG
This was off the shelf at a local shop and I like the way it felt. I usually prefer the Ergo soft grips but this one will take a Cerakote application to further color match the rifle

Handguard: Keymod Slim free floating
I have this style on all my ARs from the same manufacturer and I love them. They hold up well. The top rail lines up perfect and the slim sides line up perfectly to the side charging upper as well. I don't hang a lot of stuff on my ARs but if I need the space it's there if not it's nice and smooth. This rifle will get a bipod and that's probably it

Optics: Vortex Diamondback Tactical 4-16x44 MRAD
I ended up finally settling on a Vortex. Originally outside of my budget but thanks to GovX I found one that matched my criteria in my price range. I prefer the mil/mil (MRAD) scopes with 30mm tubes and tactical knobs.

Paint: Cerakote Magpul Flat Dark Earth
Matches the dead grass I'll be using this rifle in proximity to. I have some Kryptec stenciles so I may have some fun with it but I like the idea of one color throughout.

Trigger: Hammerhead Frenzy
Drop in adjustable trigger 3-4lb pull

More to come! Check in from time to time and hopefully I'll show progress.

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#2
Hi and welcome

Same as you I too enjoy doing winter project builds. One of my favorite things about the AR platform is the options and choices available. While the 6.5 grendel doesn't get as much love as those "other" calibers. Its different and can be just as reliable.

Will enjoy your build and love to see your cerakote process as I am looking to try it myself on an AR pistol.

Thank you for your service.
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#3
This was the first Cerakote project I ever did. I'm handy but not a professional painter so if I can make it look this good it's not rocketsmithing.

https://www.cerakote.com/gallery/detail/...oxidation/
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#4
Welcome to the horde.
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#5
Welcome,

18" grendel's with mid length gas are difficult to tune the gas on, you will see many manufacturers only offer intermediate or rifle length gas on 18" grendel barrels. Something to research and consider.

For scopes check out the athlon midas series they were clearance out on optics plant for 250.00 for 6-24x50 30mm mil/mil illimuniated.
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#6
BCHunter Wrote:Welcome,

18" grendel's with mid length gas are difficult to tune the gas on, you will see many manufacturers only offer intermediate or rifle length gas on 18" grendel barrels. Something to research and consider.

For scopes check out the athlon midas series they were clearance out on optics plant for 250.00 for 6-24x50 30mm mil/mil illimuniated.

I'll check into that for sure. Would I be lessening that issue with an adjustable gas block?

As for the Athlon scope, does clearance mean no warranty?

Thanks again.
Crane Carry Solutions
Custom Kydex
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#7
Thanks for the welcome and info. Would an adjustable gas block help to mitigate that?

I browsed Optics Planet. I can't believe I forgot about them. I couldn't find the price point you mentioned but I was browsing the site using my phone. I'll go more in-depth tomorrow on my PC. I am intrigued by the Athlon scopes though. I love the reticle choices.

Thanks again.
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#8
If you plan to reload, an 18” Grendel with MLGS may be hard on the brass. Grendel pressure vs time is different than 5.56. Extracting an obturated case is rough on everything. Rifle length or at least Intermediate will give you a wider operating window, especially if a can is in your future.
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#9
For now I'm a New Yorker so no can with this address. After retirement maybe. Adjustable gas block won't help then?
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#10
Adjustable gas block at least gives you options, and it is not impossible just harder to fine tune.
The athlon price point may be over they were clearance them out end of 2018.
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#11
awesome looking cerekote, how did you heat them to bake on?

I have looked around for cheap small ovens I could use. Use to build heat tents back in my fiberglass building days. Could even use an old gas grill to make yourself an easy bake oven to cure parts in.
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#12
I make Kydex holsters and Kydex products. I have an oven I use for heating the kydex in the shop that I used for the Cerakote. I did run into issues with the barrel fitting so I used the kitchen oven for that. My Kydex oven is the size of a microwave or convection oven but smaller than a household so if I end up offering this as an option with CCS I'll need something bigger, but skill and experience wise that's a ways off. I've seen guys retrofit a cheap (new and not used) Walmart smoker oven and that looks like the route I'll go.

I did find some great ideas in Optics Planet, I'm watching a video on Primary Arms scope now actually.

I also stumbled onto the LaRue Tactical MBT-2S Trigger browsing around this forum and may look into that if the Hammerhead doesn't impress me.
Crane Carry Solutions
Custom Kydex
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#13
Thank you

I make Kydex holsters and other Kydex creations so I have a specialized oven in my shop I use. It's about the size of a large microwave or convection oven. It worked perfect for all the rifle parts except the barrel and handguard which I just put in the kitchen oven. Plastic parts
also get baked just at lower temps and degreasing is done with simple green instead of acetone.

I've seen people convert old school lockers for ovens using tinfoil and toaster oven guts.

In the future I'm going to copy an idea I saw online using a smoker oven from Walmart dedicated only to Cerakote and lined with some ceramic floor tiles like my Kydex oven. Even the longest barrels should fit in that.

I did see some other nice scope options in Optics Planet. I definitely like the Athlon scopes. First I've seen of them.

I'll have to look into the mid gas. Having owned and loaded the (wild cat) 300 Whisper years back I'm used to tinkering and tuning loads. Back then AA1680 for subs and H110 for supers wasn't exactly figured out yet so there was a lot of trial and error with a host of pistol powders.

I'd hate to have to buy another barrel already so if it's just a matter of finding a pet load I'll go that route. If I'm looking at ruined brass and bolts then a new barrel it is. Or another gas port drilled.
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#14
In the process of returning the 18" mid-gas in exchange for a 20" rifle-gas with 5R rifling.
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#15
Grabbed a 20" 5R myself a month or so ago. Waiting for optics and sunshine to be able to try it out.
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#16
For a mil/mil scope the Primary Arms 4x14 first focal plane is quite a bargain.
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#17
Cool build!

I just finished a 24" SS barreled 6.5 G with a BCA side charge, my second side charge from them. Sweet upper without a doubt!

Athlon is my go to scope and plan to get another for this build. But for its first range day I just grabbed a scope off a pile I have. So for now it has the Bushnell AR 308 on top of it. Don't forget Amazon, I have not seen many instances where you could beat their price!


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#18
Cameraland still has the Ares at $549

https://cameralandny.com/shop/brands/ath...2.5-15x%22
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#19
I have a lot of researching to do. Thanks fellas! I love the side charger. Weather looks like I might be able to get some spraying done. It would be nice to get this built. Range season starts 1 Apr at work so I can show it off and range it in. ;-)
Crane Carry Solutions
Custom Kydex
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#20
So the weather and my work schedule finally agreed on something and I was able to get the Cerakote applied. I guess I dropped the charging handle and bolt catch into the sand when I was blasting and didn't realize until assembly so I'll be getting the airbrush out for those. I don't like how the Strike Industries version of FDE is off a little from Cerakote's so I'll be spraying again either way.
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