Jgun

I bet it would be possible to modify one of the longer low pro gas blocks so that you could have it overlap the gas block shoulder of the barrel. aside from cutting the shoulder clearance to offste the gas block back, you'd also need to drill a new gas port hole and gas tube roll pin hole further forward in the gas block, and then you'd be able to have the gas block cover the exposed part of the gas tube.

usspfnorman, Can clarify for me, are you saying that you have a Mega monolithic upper? or is the picture you posted, of what appears to be a YHM rail, the gun in question?

Since the title of his original post says Mono rail, I am understanding that the location of the gas block shoulder on the Krieger barrel is slightly forward of the front of the Mega's mono rail. I would think the only options here are going to be a custom gas block, or a different barrel. I'd go for the custom gas block. It would be a shame to not mount the Krieger.

Unless you have access to a lathe or are prepared to pay someone with one to remove the correct amount of material from the back of the JP brake so that it times correctly, IMO you're better off with shimming the comp on the barrel than using a crush washer. I think you can buy the shim kits from Midway and Brownells. Then all you do is stack them until the brake is oriented as you's like. Some people choose to cant them slightly to counteract the opposite torque that is caused be the bullet applying pressure on the barrels rifling. If you go with the shims you can try it both vertically orientaed and canted to see which you prefer, and then I would use red locktite on it.

I think I recall that STI made the same decision a couple of years ago, when CA passed legistlation that would have required them to meet ridicules requirements. Unless I'm remembering it incorrectly, I think they they posted an open letter apologizing to their customers, and saying that although it would cost them financially, they felt that the people of the state needed to decide whether they wanted to allow their elected officials to decide whether or not they had the right to pick the guns they want to buy. I believe that the value of the STI competition pistols immediately went though the roof. Maybe one of our CA residents can verify this, or correct me if I'm mistaken? This whole thing has me wondering, what would happen if, by some chance, the Gov out there were able to outlaw guns, as it seems many would like. Would gun owners leave, go underground and become criminals? Would the crime rate soar if the citizens were unarmed? If so, would it have any positive effect on non gun owning voters in other states? Sorry if I'm getting off track, just free associateing I guess.

Thanks much. I have to agree with you, there's something about the stocks of the Garands and M14's (and 1903's) that gives them a classy appearance. I had originally wanted to build this gun with the idea of using the best components that modern technology had to offer, in order to see just how accurate I could get one to shoot, and that's why I purposely built it to be heavy, and planned to put it in the chassis stock. Since i have no idea how long it may be before my JAE stock gets here, (been over a year already), I figured I'd put it in the GI stock for now. I really like the look of it, but The idea of all of the adjustability of the chassis stock is very attractive as well. It should be interesting to see just how much of an improvement in accuracy I experince when I switch stocks, when/if the other one ever gets here. I was shooting a friends Garand recently, and now I can't get the idea of owning one out of my head. The only question is do I build or do I buy? I saw pictures of a Garand recently that had belonged to Jeff Cooper. It had been rinished to an extremely high standard, was engraved, and had a presentation grade stock. Boy was that thing beautiful!!. I've been looking online but so far have been able to relocate the site where I saw the pics.

M25 is ready for function testing. Not sure when I'll get out to the range for that. I have to order some more GMM ammo, and I'd really like to see if I can borrow a suitable optic to see how accurate it is, but at least I'll be able to see how it feeds and ejects. I'm not sure if I'll keep the JP brake on there of switch to a Surefire direct connect. I had also planned for it to be in the JAE stock, but I have yet to see that even though it was the first part I ordered for this project. It has certainly been (and continues to be) a learning experience. I'll tell you this, there is a lot more gunsmithing involved in putting one of these together as compared to an AR.

I have to agree with robo on this. I thought they really broke new ground with the costume and special effects on those movies. Now granted, the cgi technology has surpassed what was achievable back then, but going by the posted pictures, the suit doesn't impress me too much.

survivalshop, That M1 looks to be in perfect condition. Care to share a little history on that one?

Yes, beutiful stock, gun looks pristine. Do you know if that is the normal way 1903 barrels are configured? as far a length, and not having any type of muzzle device, or is it like that because it's a sniper variant?

I guess your photo of the 16" with the gas tube exposed between the FF tube and the back of your gas block is the giveaway that the dimension between the barrel nut shoulder and the gas block shoulder is longer on the 16 than it was on the 18.5" bull barrel. As I mentioned in my other post, I'm thinking that DPMS must have done that on purpose, I just am not sure why. I would also think that the possible effects I mentioned, delayed bolt opening, and reduced gas force acting on the carrier, may be the reasons. If It's functioning as is, and the barrel was using that length gas tube originally, I don't see any reason why you should bother to cut down a mid length tube, besides, you will be cutting off the larger dia at the end which seals the tube to the gas key, and you may end up with less cycling force working on the carrier. If it were me, I'd try to get a look at a factory 16" Oracle setup, just to confirm that the gas tube protrudes the same distance into the upper on that as it does on your's. I don't think I'd bother changing anything until I did that. Good luck, and please let us know what you determine.

I was giving this a little more thought, and going through the possible reasons that the tube end could be mislocated. The OP says that the back of the barrel extension is located correctly inside the receiver, so if we accept that, there is no problem there. The gas block appears (in the photo) to match up, so if we eliminate that, the only two possibilities become the tube or the barrel. I thought that for the most part, gas tube lengths were standardized, with Armalite having their own lengths, (and some of the short Noveske gas systems I think). Now, unless DPMS has elected to go with a proprietary gas tube to match a different gas port location on the Oracle, That would leave a mislocated gas port on the barrel (unlikely) OR, could they have purposely, chosen to relocate the gas port on the 16" barrel, to change (reduce) the gas impulse by having the gas tube intentionally be shallower in the gas key, and thereby cause it to have a shorter power impulse on the carrier? After all, it is usually agreed that these guns are over gassed. I would think that having a smaller gas port in the barrel would be a more common way to accomplish that goal, but I can't help but wonder why the gas port would be located like that if not on purpose. Maybe it has something to do with timing, delaying the point where gas is directed back to start the unlocking of the bolt?

I was going to write it out but this is easier, It means "Come and take them" Great saying. www.molonlabe.com/MLstory.html

Took a look at a couple of mine, (none DPMS receivers), and your gas tube end is definitely short compared to mine, But then you already knew that. I don't have a carbine gas tube on hand, but I'm wodering, just to save yourself the wait and disappointment if it turns out not to be the gas tube, since your in contact with the barrel seller, can you ask him for an accurate measurement of the gas tube he's going to send you? I'm thinking that if it turns out that the gas tubes are the same, you can get started on figuring out how to solve the problem by switching something else (different type of gas block maybe) , or getting a gas tube that IS longer. I have not worked on the DPMS Oracle's, but it seems that DPMS likes to change things around these days to make it difficult to use others components on their guns. They changed the receiver rail heights, and now some of the Manufacturers quad rails dont match up (the ones that have not opted to offer a DPMS specific handguard). Since you had both barrels out of the gun in the picture, can't you take measurements of both to see where the difference lies? Since you say that the barrel extension lines up properly inside the receiver, I would assume that the distance from the barrel nut shoulder to the back of the extension is the same, but what about the distance from the back of the shoulder to the gas port on the barrel, is it the same on both barrels? You probably already know this, but since you're switching barrels, it would be a good idea to double check the head space before you fire the gun, and yes, I don't see why it should be a problem to shoot the gun with the short tube (although I've never tried that myself), by the way, does the tube even make it into the end of the carrier key?

I see that there's another Christensen Arms AR on GB. This one's a small platform gun. Price is almost low enough to seriously consider. www.gunbroker.com/Auction/ViewItem.aspx?Item=305025634

Yeah, I know that the Israeli's use AR's (among other things), but I still stand by my last comment. The Galil is a very tough weapon, and I believe it would likely run longer without cleaning than a DI .308 AR. of course, it's also heavier, less accurate, and harder to mount optic/night vision/accessories to. I've also become more comfortable with the ergonomics of the AR than than any other gun, so it would likely be the gun I'd go to if I were to choose between the two, but I'd still take the Galil over the FAL. Of course that choice is also probably influenced to some extent by personal preference.

Disregarding the stories that I've heard about the FA being a bandaid that was added because the original M16s were jamming in combat (due to the Gov using different powder than the designers used) I read (maybe here) that a contemporary use for the FA in combat is so that the soldier can slowly release the bolt carrier to be quiet, and then push the FA to be sure that the bolts fully closed. Any of you military members know if there is any truth to this?

IMO the .308 Galil is a better choice than the FAL, but comparing it to the AR is like apples and oranges. The AR is certainly more accurate but I believe the Galil is a tougher, more durable weapon, and I'd bet in a torture test would outlast the AR.

Could you clarify this for me? Am I understanding you correctly that this non reciprocating upper receiver is being offered by American Spirit Arms? I see that you're referring to it for use on an AR 15 platform, is that correct? I recall that they build complete .308 guns with the non reciprocating side charger, do you know if they intend to offer large platform upper receivers and bolt carriers as well?

Thats a pretty neat trick 80 on the receiver and only 20 through the barrel. Seriously though, why did you remove the previous barrel with only 60 rds on the gun?

I'm always amazed when I hear the lengths to which the bench rest competitors go, to remove all variables from the shooting equation. As fascinating as I find it, I don't believe that I am organized, or methodical enough (at least not yet) to do what it takes to effectively participate in those types of shooting competition. It sounds as though the high power shooters have a need for some of that same attention to detail. I have listened to a friend that was getting into precision bench shooting, describe weighing cases, measuring the volume that each one holds, checking the runout, even going so far as to mark his cases so that they are always indexed the same in his bolt gun. He even keeps records of all of this. I must admit that I am becoming more interested in the concept of seeing just how mechanically accurate I can build a gun to be. I must admit also that I like the concept of human involvement that high power has that seems to be less evident in bench rest. I presently am building a .308 AR and my M25, both of which I have attempted to build to the highest level of mechanical accuracy that I am able, with my resources and skill at this time, but my AR only has a 20" barrel, and the M25 a 22". I am thinking that I may try out the local high power matches next year, but after reading what your doing to try to be competitive, I don't have high expectations of being able to do very well, especially with my admittedly poor record keeping. Thanks for giving a glimpse of what it takes to play in high power.

Although I really like Art's rails (SWS), I'm not all that impressed with the other parts chosen for this gun. I certainly think the MA Ten receivers are superior to the DPMS. Based on the kitchen counter pictures, it looks like someone is looking to make the move from home builder to professional AR builder. I don't see amything here that one of our members couldn't duplicate.

You mentioned that you adjusted the gas rings to reduce drag in the carrier, aside from that, are you using a stock DPMS carrier as it came with the rifle? Also, is the buffer and spring also stock? What about the two stage trigger, do you know what brand two stage trigger it is? What is the pull weight? How is the upper lower fit, is it tight? I see that you say that White Oak built your upper with a 26" barrel, do you know what blank was used, ROT? You say that they moved the gas port out 2", I didn't even know that it was possible to get a gas tube that was longer than rifle length. Very impressive rifle (and shooting). Please excuse my ignorance if I'm using the incorrect term, but since your shooting 6.5 cal, does that mean that your in open/unlimited division? Would you be shooting your large platform gun head to head with the other two that you mentioned? If so I'm curious about the tradeoff of reduced recoil/extra weight when shooting off hand. Is it your opinion that the large platform is superior (for you) than a fully modified small platform AR?

Hollywood, is the one pictured in your post an accushot?

I don't know if you've still got this brake, but if so, can you give me your best price for it?