Jgun

Is this Mega upper intended to be mated to the Iron Ridge lower you have posted about? Did you ask Mega or Iron Ridge if they were compatable?

The Armalite gas system is slightly longer than the DPMS, around .250" I believe. This is why you will need a longer gas tube. The gas blocks should be interchangeable between the two platforms as long as the Id of your gas block matches the OD of the barrel in the gas port location, the common sizes will be .750', .875" for a lighter barrel, and .936" for a heavy barrel. Of more importance is that the bolt/BCG match the barrel extension. I have heard different from certain people, but most of us usually match the BCG to the barrel type, so if your going to use an Armalite barrel, to play it safe you ought to use an Armalite, or Amalite type BCG. If you've already got a different BCG, you might want to decide if you want to switch BCG's or would you prefer to get a barrel that matches the BCG you've got?

Wish I had the extra cash this week, if so I'd pick one of these up. blog.rainierarms.com/2012/01/23/axts-a-dac-f-125/

Welcome Johann, Sounds like your building your gun for the right reason, (because the actual building gives you pleasure). If you've done the PG conversions on Saiga rifles, and have built a couple of AR-15's, a .308 AR build will give you no trouble, besides allowing you to spec it out exactly the way your desire/finances dictate. The one thing I will caution you on, (which you probably already know) is that, unlike the AR-15, there is no mil spec for the .308 AR, so I hope you've done your research regarding parts compatibility. The DPMS and Armalite patterns don't completely interchange. Hopefully you've ordered all compatible components. It's always a PITA to have to send back and reorder when you didn't get the right parts to begin with. By the way what receiver set have you chosen?

It would seem logical to assume that it would be a 7.62 X 51. Didn't they introduce the SR 556 last? Although, it would probably be much less cash outlay for them to introduce a 300BLK based on the SR 556 platform than to come up with a completely new gun based on a different receiver?

I've never tried an optic with that reticle, but after seeing this post, I'd like to.

You might want to try a Pmag, I've found that in my .308's (none DPMS) they have been 100% reliable, while I've experienced some nose dive feed problems with DPMS mags.

Very cool. Hmmm, $40 per rd, makes .458 SOCOM seem economical!

I've checked some of my FMJ ammo and it measures 2.790"-2.800". I've never had any feed issues with it loaded in Pmags, with any of my .308 AR's. I'd be inclind to think that your problems are mag or gun related, not COL.

What gun/mag are you shooting? Have you tried any other mags (different brand) to see if the issue is mag and not ammunition related? What is the COL of ammunition that you've used that has fed from the mag without incident?

My wife is Ukrainian, so I probably know more about this than many of you. I will say that from my experiences in her country, and with her, that They are one tough bunch of people. She's not always the easiest person to live with, but it's never boring, thats for sure.

Only way to use a DPMS upper with a POF lower is to make small bushings that go into the takedown and pivot pin lug holes on the DPMS upper, because POF uses .250" dia pivot and takedown pins while DPMS (and most others) use .277" pins. If you physically were to assemble a POF lower and DPMS upper together without the bushings, the gun may function, but you'll have.027" play between the pins of the lower and the lugs of the upper, which will give you a very sloppy/loose feeling gun. I agree that the POF lowers are very nice high quality lowers. If your going piston just use POF upper stuff and save yourself a LOT of aggravation. If your going DI the GAP parts would be great, (if they will sell them to you separately). You could also contact Doug Kircher at MOLON LABE and see if he has any of the uppers left that he made for building a DI .308 AR using a POF lower. I have one of them and it's a pretty neat piece. You can find my post with pics of it, in the POF section of this forum. By the way, a gun built using matched upper and lower (and other components) from one manufacturer, will almost always bring a higher resale price than a "Frankengun", if you should decide to sell it later on

Some of my AR's have it and some don't. Personally, I've yet to have a situation arise where I've used it. I've heard different pro and con arguments for /against it. I think that you probably won't ever end up using it, If you should happen to end up building on a receiver set that has it. Something else, the forward assist button needs serrations on the bolt carrier to function so make sure that your carrier has them or the FA will be ornamental. Some of the guys say that they prefer the look of an upper that has the FA.

I'm also in the market for a good quality bipod for a gun I'm building with primarily bench shooting in mind. I'm thinking about trying a monopod on the rear as well. I've been looking at the Rock SOPMOD bipod. Up to now I've been getting away with the grip pods, but am ready to try something with a wider stance. I will also be interested in any replies to your post.

Yeah, I'm going to have to pick myself up a couple of those, LOL.

I don't own a DPMS gun, but I'd bet that many of our members here that do, have exceeded 5K rds. Any DPMS owners (who, unlike me, can speak from personal experience) care to comment on how your guns are holding up? I don't think that there are many people, ANYWHERE, that are putting 10,000 rds a month through a 7.62 AR. That's over 300 rds a day, every day, for a month. If this guy's saying that within 5,000-10,000 rds he's experienced some type of malfunction with a DPMS platform gun, that's one thing, but to say that the gun is worn out beyond repair seems unlikely. By the way, isn't it generally agreed that most barrels are shot out by 10,000 rds?

As the other posters have said, there is no reason to believe that a DPMS .308 AR is going to wear out any faster than one of the other brand rifles. Understand that, the receiver whether made using, 6061, or 7075 aluminum, forged or billet, should last as long as you. Now parts like barrels, springs, etc, will wear out on any gun, although the "wear" parts on higher end guns may last somewhat longer. i don't know what you want the gun to do, but if longevity/durability are your priorities, you would do well to have a chrome lined barrel. I have been led to understand (but have not as of yet tested for myself) that the treatments, such as melonite and fail zero, can add greatly to the life of some of your consumable components, but you have to be careful to use the proper treatment in the correct application, and pay attention to compatibility with other components. I have heard that, due to their hardness, the TIN and nickel boron treatments can wear non treated parts (such as hammers) that the treated parts are in contact with. All thing considered, I doubt that the factory stock DPMS .308's will wear out noticeably faster than any similarly barreled, more expensive gun.

For a person that does machine work as a hobby, that's a pretty amazing collection of machines. I especially like that P&W lathe. I see one of the captions says "back together" does that mean you had to rebuild it after you picked it up? By the way, just curious, do you find that you use the horizontal very often? It looks like you've got a lot of square footage to work with in your shop. In my case, I actually had to construct a small shed, because my home is on a slab with no basement, and the garage was converted to living space ( with just enough room for a couple of MC's) years ago. I poured a slab in the back yard, and after bringing in the mill I put the shed up around it. It's only 12'X16' so, as you can imagine, space is at a premium. I will be very happy if I'm able to move around in there once I've added the lathe. Next chance I get I'll post a couple of pictures. Thanks for sharing.

Much hanks for your information. I, presently, have a bridgeport, but haven't come across the right deal on a lathe. Since setting up the shop, I don't know how I ever managed to get anything done without it, (good friends). Although I have some limited tooling, I have a long way to go. It seems as though I have to pick up some expensive tool/gauge/cutter on every project I do. I'm presently considering trying to make a bolt action receiver from scratch. Have you ever built any of the small IC engines? Every time I watch one of them run on a bench, I'm mesmerized, but I just don't think I have the spare hours needed to complete one right now.

Your project is very impressive. Perhaps i can ask a couple of questions? First off, can you tell me who's forging you used for the project? Second, I have considered attempting something like this, but became discouraged when I looked into what the tooling needed (that I didn't already have) would cost me. The tap used to thread the back of the receiver for the buffer tube isn't cheap, and unless you have other uses for it, I find it hard to justify the expense if only making one receiver. Can you tell me if you work commercially as a machinist, from the pictures it appears as though you have a very complete collection of tooling for this type of work. And lastly, do you have access to type 3 hardcoating done on individual pieces in your area? I was unable to find a plater in my area willing to do hardcoating at a reasonable per piece rate.

That's of great help, thanks,

Looks very impressive, but I'm thinking that you'd better like whatever configurations Colt's offering the uppers in, because it doesn't look like any AR upper that I've ever seen. I can't help but wonder if all of the upper parts are going to be proprietary. Does anyone know if the uppers for this platform are monolithic? I wonder if this gun, set up with the 7.62 upper, works out to be lighter than a conventional large platform AR?

Looks just a good as their AR-15 carriers. Although I'd like to try out the Fail zero coatings, I think the price on those carriers is out of line. I wonder if Young Mfg. will decide to offer a super light .308 carrier?

If memory serves me, the 12" DD Lite .308 AR rail is actually 12.75" and will probably be just about even with the back of a low pro rifle length GB (as long as it's not an AR-10 rifle length) IMO it's one of the best rails available, just expensive.

The picture on the website can be deceiving, Art makes a very good rail. If you'd like to see a different view of the SWS rail, take a look at the Noveske website, it's essentially the same rail, but marked Noveske. I have one and would have to agree, it is more open than the DD rail, but not as much as the picture on the SWS website would make it appear. But if I'm not mistaken, weren't you considering the Troy in order to cover the rifle length low pro gas block? If so the 13" SWS won't do the job, only the 15" sniper handguard, and unless I'm mistaken the 12.5" Noveske won't cover the GB either.