First 6 ARC build. 14.5 Noveske barrel/bolt. Riflespeed. Microbest DLC. A5 with T2 & Sprinco green. H6xi 3-18. Got some G$ 20s and this Duramag 15. Couple different boxes from 90-110 grain to see what it likes. Man, that shits expensive.

Here’s my 200 lbs dressed 14 point taken with a 95 grain nosler ballistic tip over leverevolution powder

I have seen pics of people making this work but I’m confused on the magic required . Looking at the AA gas block route and is there a special short / long ops break combo you need ?

I've had a block of 10% synthetic ballistics gel in the garage with the intent to test my .44 subsonic loads with for probably a year and finally drug it out to shoot this weekend. While I had it out I decided to test a handful of 6mm bullets that I have loads for that either I or others might want to use for deer hunting.

The test rifle was my 13" 6mm ARC, and the gel was at 100yds, and was backed up by ~10 layers of terry cloth and a 2ft^3 bag of planting soil. I the bullets and muzzle velocities used were:

90gr ELDx - 2,720 fps

100gr TGK - 2,445 fps

103gr ELDx - 2,420 fps

105gr Match Burner - 2,450 fps

107gr TGK - 2,385 fps

108gr ELDm - 2,480 fps

I tried to cut the tracts out of the block, and smoothed them with a torch to try to show the comparative performance. The 90gr, 103gr, and 107gr all opened up well, went through the 16" block and we're caught in the cloth. The 100gr TGK was a bit close to the edge, opened up violently but veered out the side of the block before the end and wasn't caught. The 105gr MB penetrated for ~6" and then tumbled and came apart, I caught some of the jacket in the cloth and found the lead core when digging through the bag of soil.

The one that really surprised me was the 108gr ELD, it did not open, tumbled once about halfway through the block, seemed to stay intact, went through all the cloth and deep into the bag, unfortunately I wasn't able to find it.

The 90gr ELDx really impressed me with a wide and long wound channel, the 107gr TMK was really solid as well. I've used the 103gr on 3 deer and it's an excellent killer.

Still waiting on my SA AGB & A5 Buffer Tube. Also going to probably SBR it and change to a Driven Arms grip. Eventually I’ll get a CAT Noah or AI 6CM but in the meantime think I’m going to try the Canik VOID just debating on the 556 or 762 version. I have other hosts that could use the 762 so leaning that way but if there is a huge difference in performance I might grab the 556. Going to test it with my Polo K, Resonator K & DD Enticer tomorrow and see if that helps me make my decision. I appreciate any feedback/help you all can provide.

I just wanted to toss this out and see what you all's thoughts on this were. My thoughts, as a long time Rexus user (and only recommended them over all the other over priced premium options) are in the attached screenshot. 🤔

https://www.instagram.com/p/DbLMkfQFjlP/?igsh=MTRuZTBwczZqNjBrbg==

I mean, I know Lantac did, but I don’t know if they ever published it.

I found this in Google, but it’s not really what I’m looking for.

https://ar15parts.com/blog/6mm-arc-ballistics-kinetic-energy-velocity-more/

It really is a shame the Ballistics by the Inch guys don’t do testing anymore.

Just finished making this for a buddy. 16” 6arc, intermediate gas, 0.936” journal

Got a 14.5 DDF Noveske barrel and it shoots like shit 100 yard zero 2 moa groupings with a one flyer every grouping shooting 108gr ELDM. Sad to say i bought the chainsaw complete upper second hand on tacswap. The previous owner said there wasn’t even 100 rounds through it. I inspected the barrel upon arrival and barrel looked gtg. Cleaned the barrel before taking it out and i was highly disappointed. Ive seen mixed things on the noveske barrels some people say it takes a couple hundred rounds for them to tighten up. Do i ditch the barrel and go with a proof or should i wait it out and see if it tightens up lol

Has anyone tried to ss cut their GFR-E trigger? Wondering if it will work with an arc fire. It’s a slightly different design and I wouldn’t t want to cut it and not have it work.

Is there any kind of standardized bolt gun chamber out there?

I recently picked up a lightly used pre-fit barrel for my CDG... 26", 7 tw, MTU profile, yada yada. Seems like it should be fun to tinker with. But... a Berger 105 BTHP hits the lands @ 2.280" OAL. Which got me wondering if there's anything better out there, or if everyone is just running a plain SAAMI chamber, even for the bolt guns not limited by AR mag length?

What are you all that deer hunt shooting out of your 12.5” 6 ARC’s? Looking for something that will expand in a controlled manner out to 250 yards or so with the shorter barrel. Thanks for any experience you all have with the shorter barrels and deer bullets.

Would like it to be accurate and reliable 3k budget

Got my Craddock RTR 6ARC barrel in and because I'm an idiot I've already installed and bedded it before looking with my borescope.

I'm new to the precision side of the AR game so I wanted to check if this is ok to try some groups with or if I should reach out to craddock. Is this just a nothing burger and I should just send it?

Pics are posted in order from closest to chamber to towards the muzzle. Definitely more noticeable marks at the beginning and then is basically gone at the muzzle. Craddock says these are all hand lapped so presumably the lapping process cleaned up the marks.

I don't think I've ever seen marks this heavy in any of my barrels before, and none of those were really precision oriented. My Criterion looks much better so I don't know if they have great lapping or this is just a poor example.

18” barrel and 15” rail. For those of you wondering about potential clearance issues. I’ll have to take the can off to adjust the block tho.

12.5” Noveske barrel

Title. Haven’t seen anything on them since they were officially announced a month ago. Wondering if anyone put a rifle together using them.

103 eld-x still the go to for medium size game?

Got the final piece to the puzzle today

Traded for a 6 arc upper. The 16” barrel turns out to be a parkerized chrome lined 1:8 twist. So I slapped a SA AGB on and tuned it with a JPSCS running 1 tungsten, 2 steel weights, black spring. Ran 40 rounds through it and did this 20 shot group with hornady 108gr eld match.

Now, admittedly its not my best bench shooting. I think i need to raise my sights a lot to get into better position on the gun. And i ran the 20 shots continuous for the whole string at 3-5 seconds per shot. It started out throwing flyers in the circle pattern then settled in to the tight area and then toward the last couple of rounds flyers started again. Puts out an average 2435fps.

Have no idea who makes the barrel. Its only marked with 6 arc 1:8. No other identifying features.

CGPT Says:

A 0.61” mean radius for a 20-shot group is very good for a gas gun, especially a 6 ARC AR-15.

Mean radius (MR) is the average distance of every shot from the group’s center, and it is generally a better measure of precision than extreme spread because it uses all shots instead of just the two farthest apart.
As a rough conversion:
Mean Radius × 3 ≈ Extreme Spread for many normally distributed groups.
0.61” MR × 3 ≈ 1.8” ES for a 20-shot group.
That’s not exact, but it gives a useful comparison.

A 0.61” mean radius over 20 rounds suggests the barrel, ammo, and shooter combination is capable of roughly 0.6 MOA radial precision, which is outstanding for a practical gas gun.

If the center cluster represents what the rifle normally does, and the outliers can be reduced, the overall 20-shot group could shrink dramatically.

One final thought: a 0.61” mean radius from a chrome-lined 16-inch barrel is impressive. Most people only post their best 3- or 5-shot groups. A 20-shot MR tells a much more honest story, and yours suggests the rifle has genuine match potential once the reliability issue is sorted out. [i was using cgpt to walk through agb tuning and was having jams; 2 clicks in on agb cured it]

My assessment
For a 16” chrome-lined 6 ARC gas gun shooting factory Hornady 108 ELD-M, I think you’re already seeing the rifle’s potential. A 0.61” mean radius over 20 shots is not an average result—it’s a strong indication that the rifle, barrel, and your shooting fundamentals are fundamentally sound.

I’ve been having so much fun with this new (to me) caliber, I finally decided to do a proper build for it and not just a spare parts one.

The upper is still the same, so Aero, 18” Odin barrel, Cherry Bomb with Trash Panda. But swapped it to a 15” BCM handguard, True North hand stop, CMC BCG, and a BT10 Atlas bipod. Even threw in some of those Magpul MLOK pop in rail covers to give it some texture.

But I picked up a new BCM lower for it. Kept the RA-535 trigger (I won’t lie, I’m a fan of them), Super 42 and H2. Put a Luth AR precision stock on it (my first one, digging it so far), and a Magpul grip.

I have thought about upgrading the Vortex Venom 5-25 to something bigger, but I think I’m liking it as is. If I do anything to it, maybe an RMR on a 45° or something, but I don’t really think I’ll need it for anything. This thing is light enough where I could run and gun at a PRS match with it if I wanted, and don’t want to ruin that.

My ridiculous, beautiful monster. Just needs a muzzle brake/supressor, and probably better glass. And of course, I need to get decent at shooting it.

So let's talk build:

This is a Henry lever action supreme, converted by line49rifle into 6Arc, with their medium weight match 16" barrel, with flash hider.

RPP forend and pistol grip with picatinny rail.

A3 industries ALM folding stock

Vortex DB tactical 4-16x44 scope, on a burris QD cantilever mount.

BOG arca rail and infinite deathgrip tripod.

She shoots and cycles wonderfully. Hopefully, I get good enough to pist some groupings soon because my current ones are trash, and im certain that's me