Gonna throw some things out there for opinions on 6.8 build
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  1. #1

    Default Gonna throw some things out there for opinions on 6.8 build

    As for AR15s, I have them in 5.56, 308, 300BO, 7.62x39, 9mm and .45ACP. I wanted something else, not crazy expensive, so I did research on 6.8 and 6.5, I decided on 6.8 for a few reasons. It hits harder than 5.56 and weights less than 308. 6.5 Grendel performs better out of longer barrels and at distance. The 6.8 was designed as a shorter range round which I like. I do not and cannot shoot long range.

    When I read about the SIX8 I said that's the one. I even handled one but did not get to shoot it. Well too much money, it's the way to go but only if you got the bucks or plan on keeping it as a go to gun. I get bored easy and like to change things up and around. So I figured I'll build one since me and my gunsmith friend have built so many already in various calibers 6.8 seems like the next step. He was skeptical but I convince him the bugs of the past have been worked out.

    It seems most run without any major problems if you just like any firearm build stick to compatible and well made parts.

    My plan is to get a ARP 16" barrel and one of their BCGs. It looks like they also have a bigger bolt head and matching barrel extension for it if you want. I might go in that direction. Right now they do not have a barrel in stock. And I am not crazy about the profile. I prefer a thicker barrel to be honest.

    Or I can get the Wilson Combat 16" or 14.7" barrel. A NiB M16 carrier and a LWRC bolt. Those are the important parts, a mil-spec upper and BCM charging handle are all that's needed, some PRI 10rd & 25rd mags and go shooting. Use one of my other AR lowers for now.

    So I have a few questions I would like to ask? Things that have not been answered in all of my readings about the round and how it works in an AR15. One question surrounds the muzzle device. From experience even though it fits the thread it doesn't mean it works well with that round. VG6 precision makes a 6.8 specific brake. I have a few VG6 brakes on my rifles and they work better than anything else I tried. On some of my 5.56mm I use the BCM gunfighter since a pure brake isn't really necessary on a light shooter. I like that the BCM works well as a brake, comp and hider on 5.56mm, didn't like it all that much on the others and the VG6 worked much better and louder unfortunately. Once you go up in recoil a true brake is good and their 308 and 300 BO works well, the 300 BO even works well on my CMMG Mutant. I do have a 308 BCM laying around, has anyone tried it on a 6.8? Has anyone tried the VG6 on their 6.8?

    Next is ammo, is there a place that supports the 6.8 and has 6.8 ammo in quantity and choices at a good price. I usually go to SGA for my ammo, I'm in central Texas so they ship fast, have a good price and selection for most ammo needs. I see the well dried up for cheap XM68 but Sellier Bellot makes some good stuff and for hunting/self-defense Hornady and Federal are supporting 6.8 and there seems to be ammo available. Any other manufacturers out there? Especially for plinking, under $15 a box of 20? I have been checking ammo seek and everybody has the same stuff at varying prices. I forgot I also see SSA has some good ammo available also.

    So I'll probably start the building of an upper once I get an idea of when ARP has those barrels in. Get some PRI and Barrett mags, a couple 100 rounds of various ammo and let er' rip.

    Any input would be appreciated especially from personal experiences with those barrels and bolts as well as mags and ammo. Thanks.
    Last edited by bigdaddytexasguns; 03-19-2017 at 11:57 PM.

  2. #2
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    For the 6.8 it's all about barrels, bolts and magazines. Everything else is up to your preference since it is compatible with all Ar-15 based components and there are many 5/8 x 24 muzzle devices. I am starting to prefer the flash hiders over the brakes for my 6.8s because of the concussion difference at the range without much difference in barrel jump between the two.

    I have a factory built LWRC M6A3 (pre-Six8) and 3 other 6.8 rifles with a Wilson Combat Match barrel, a Bison Armory barrel, and an ARP barrel. All 4 shoot MOA with a wide range of factory ammo. I have tested all of them on an outdoor 200-300 yard range with steel silhouettes and you can see the "effects" on the target when a 6.8 hits. Great energy in that round and these barrels make it happen.
    ARP bolts are best in class and priced well. LWRC and Wilson Combat both good bolts for different reasons (different finishes) but pricey. I'm sure the Daniel Defense and other milspec-type bolts are fine too. You'll get longer life out of the ARP bolt though.




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  3. #3
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    And ammo. Sounds like best possible accuracy is out of hand loads that work best in whatever barrel you get.
    I've had great accuracy results in all 4 barrels with Hornady 110g BTHP Match. Everything else factory wise works well enough.


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  4. #4

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    Well I just have to wait until ARP has barrels. Hopefully they have BCGs ready to go I'd like to buy everything in one place. If not there's some alternatives.

    I think the 6.8mm SPC is a true intermediate cartridge and is just better than the 5.56mm for hunting and home/self defense. The DOD should have ditched the 5.56 for the 6.8, less need for 7.62 and a much more effective round in every way including barrel length. The 5.56 shines with 20" barrel the 6.8 with much shorter. It would even compete with the 300BO for many uses. And by adding the M80A1/M855A1 construction the 6.8 bullet would be a truly effect combat round. They sure missed the boat on this and the Marines trying to move to the M28 as the standard battle rifle proves my point, 16" heavy barrel over the 14.5 and piston driven instead of DI. Something like the LWRC SIX8 should have been made the standard issue for all USA military personnel. Add a 6.8mm Ultimax 100 type SAW and a true belt fed LMG and you have a lot more firepower within the squad and platoon.

    What I really want is a LWRC SIX8 but I cannot justify the cost and parts are just too difficult to obtain compared with a mil-spec AR15. So I will build an upper to try and if it works the way I want I will follow up with a lower and build a complete pistol using a Shockwave brace as long as the caliber is supported. If it runs dry I can always replace the barrel & bolt to 5.56 and sell the mags. But I have a feeling the 6.8 will become more popular due to it's effectiveness and the fact ammo is on par price wise with 300BO and 308. if the ammo companies start making more, especially the foreign ones and dump cheap ammo on the market the popularity will skyrocket? It's just a better round, a true intermediate round that does not suffer from less effectiveness with a shorter barrel like the 5.56 does.

  5. #5
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    If you like the heavier profile barrel you would probably prefer the ARP SOCOM profile, it is a little heavier and thicker. H says he should have those in about the same time as the 12.5s. Maybe May.
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  6. #6
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    I'd wait on a ARP Socom or Scout, either one will shoot great. He has carriers, bolts and several muzzle devices also.

    If you needed a barrel now, I'd go to Bison or WC.

    As for ammo, you are on the right path for finding 6.8 with ammo seek. Some of those prices are below dealer costs. You might could talk to your local gun shops and see if they can add a few boxes of your choice to their next order.
    6.8X43 for hunting

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  7. #7

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    I think I'll wait for the ARP barrel.

    As for local gun shops...they're a joke around here. You'd think a place like Ft. Hood in central Texas would have a lot but they don't. And worse are the so called gunsmiths here. The pawn shops ask above retail for used guns too. I was lucky and befriended a very good gunsmith here, great guy and competent smith.

    I get most of my ammo online. The stores here are outrageously expensive. Walmart has the best prices, they just opened a Gander Mountain and it's parking lot is always empty. Academy is OK but their prices have risen and with tax they're too high. So like I said it's usually SGA in Oklahoma.

    It looks like 6.8 is here to stay. It's a superior hunting round to the 5.56 and 300 BO, the 300 being better for suppressed operation. It's lighter than the 308 and many times the 308 is overkill. I don't hunt I just shoot and love guns.

    I think initial problems were from poor chamber design and lack of proper mags. As long as the length of the round is within certain dimensions it seems to be fine. With upgraded bolts and good mags I don't see any issues. If the well dries up I can always change it to 5.56.

    I never liked the 5.56 while in the army, the rounds worked better from 20" barrels though. The 6.8 looks like the perfect infantry round for modern warfare. Although the new M855A1 looks promising. A 6.8 version would be devastating and give the individual soldier and squad a huge advantage on a battlefield. I have humped an M60 it was heavy, although weight is a consideration knowing your weapon is better than anything anybody else has gives you confidence.

  8. #8
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    And if you do not reload, you can sell your brass pretty fast on this site if you're at $0.35 to $0.40 per brass shipped ($7-8 per box 20).

  9. #9

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    Quote Originally Posted by wxl View Post
    And if you do not reload, you can sell your brass pretty fast on this site if you're at $0.35 to $0.40 per brass shipped ($7-8 per box 20).
    Good idea thanks.


 

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