6.8 SPC in an AR questions
- Thread starter Wildbillz
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A standard lower will do. The only 6.8 specific parts you need are barrel, bolt, and magazines. The preferred specification is a SPCII chamber, and 1 in 11 or less twist. It shoots the most accurately with the least pressure.
ARPerformance, Bison, White Oak, and others are good to go. C Products, PRI, and Barrett make good mags.
You need ammo, it's all on the internet. 6.8 is not a milsurp caliber, ammo prices are no worse than commercial. SSA and a dozen others are online, in most states it can ship to your front door.
http://68forums.com/forums/forum.php << These guys will get you all the specific info you need, the industry leaders hang out there. It's a level playing field, they own other calibers, too, very little problem asking questions, but like any forum, there is a search feature and stickies that can go a long way.
http://www.ar15.com/ << These guys have the stickies in the Build it Yourself section that show exactly how to do it. Read them, too. Search only goes back 30 days due to the huge archives, a membership is needed for that. There is some awesome info in that, like thermographic studies measuring temps on DI vs Piston guns that show it's not what people think.
Enjoy your build, the only two problems are spending too much money, and discovering the average shooter doesn't really have a clue about AR's. Most of what's repeated is flat wrong, just ask where the piston is on it. They can't even see it when you point at the gas rings.
ARPerformance, Bison, White Oak, and others are good to go. C Products, PRI, and Barrett make good mags.
You need ammo, it's all on the internet. 6.8 is not a milsurp caliber, ammo prices are no worse than commercial. SSA and a dozen others are online, in most states it can ship to your front door.
http://68forums.com/forums/forum.php << These guys will get you all the specific info you need, the industry leaders hang out there. It's a level playing field, they own other calibers, too, very little problem asking questions, but like any forum, there is a search feature and stickies that can go a long way.
http://www.ar15.com/ << These guys have the stickies in the Build it Yourself section that show exactly how to do it. Read them, too. Search only goes back 30 days due to the huge archives, a membership is needed for that. There is some awesome info in that, like thermographic studies measuring temps on DI vs Piston guns that show it's not what people think.
Enjoy your build, the only two problems are spending too much money, and discovering the average shooter doesn't really have a clue about AR's. Most of what's repeated is flat wrong, just ask where the piston is on it. They can't even see it when you point at the gas rings.
What parts kit did you get or are you looking at?
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Wildbillz
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68jw
I have been looking in Shotgun news so far. Trying to decide if I am going to do it or not. I am thinking of using a 16" Disapator type barrel and putting a full size firel rail on it. I have some parts from other builds here at the house so all I will have to do is pickup an upper with the right bolt and carrier and some mags.
Funny thing is I found plenty of the ammo at Acadamy this past weekend. Remington if I recall. Thats what started the whole thing again for me.
WB
I have been looking in Shotgun news so far. Trying to decide if I am going to do it or not. I am thinking of using a 16" Disapator type barrel and putting a full size firel rail on it. I have some parts from other builds here at the house so all I will have to do is pickup an upper with the right bolt and carrier and some mags.
Funny thing is I found plenty of the ammo at Acadamy this past weekend. Remington if I recall. Thats what started the whole thing again for me.
WB
HorseSoldier
Member
I no longer have a 6.8 AR, but when I did I started out with just slapping a 6.8 upper on a lower I already had. Later when I got an LMT MRP, I just ordered the bolt and barrel. There's really no reason to get a 6.8 SPC marked lower unless you need/want it for organizational purposes or the cool factor or whatever.
mc223
Member
You can do what you want with the upper, but if you want trouble free performance, use PRI Mags.
http://www.pri-mounts.com/mm5/merchant.mvc?Screen=CTGY&Store_Code=PRI&Category_Code=6_8_MM
http://www.pri-mounts.com/mm5/merchant.mvc?Screen=CTGY&Store_Code=PRI&Category_Code=6_8_MM
Ammo is mostly SAMMI loaded, which isn't the higher performance stuff. That's not bad, though, as the 6.8 is already 40% hotter than 5.56. That's the big increase right there.
What the better chamber spec and twist rate get you is the ability to shoot Tactical loads or handload your own, up to 3,000 fps - out of a 16" barrel. Even without that, the better specs keep the pressures lower, and that helps longevity and safety. For general build parts, the Shotgun news has adds from good suppliers and some not so good. What is better is surveying the online suppliers who offer discounts, specials, and bargains a long lead paper copy cannot.
Bought an LAR blem stripped A3 upper last week for $48 and shipping, for example. It was an online and phone in only order as far as I know, and most of what I have purchased came the same way. AGP lower with trigger set screw, $79.80, Cav Arms furniture, LPK from a forum member, barrel, bolt, carrier, and pins from ARP. I have $656 in it and need an upper small parts kit, front sight base, and flash hider to finish. Brownell's may likely get the order because they offer a military discount I can't ignore.
SGN is a nice starting place, but BCM, Spikes, CMMG, and a dozen others are out there, too.
What the better chamber spec and twist rate get you is the ability to shoot Tactical loads or handload your own, up to 3,000 fps - out of a 16" barrel. Even without that, the better specs keep the pressures lower, and that helps longevity and safety. For general build parts, the Shotgun news has adds from good suppliers and some not so good. What is better is surveying the online suppliers who offer discounts, specials, and bargains a long lead paper copy cannot.
Bought an LAR blem stripped A3 upper last week for $48 and shipping, for example. It was an online and phone in only order as far as I know, and most of what I have purchased came the same way. AGP lower with trigger set screw, $79.80, Cav Arms furniture, LPK from a forum member, barrel, bolt, carrier, and pins from ARP. I have $656 in it and need an upper small parts kit, front sight base, and flash hider to finish. Brownell's may likely get the order because they offer a military discount I can't ignore.
SGN is a nice starting place, but BCM, Spikes, CMMG, and a dozen others are out there, too.
okiewita40
Member
Tirod has led you in the right direction. Check out the 68 forum. lots of great info there. I am going to get an ARP upper when i get back to the states. H makes a quality upper. By the time it is said and done I will only have about $670 in the entire gun.
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