Owl21

I have a Hyperfire 24E in my Aero M5 (DPMS based) build, and it works flawlessly.

Thanks. That will be next.

I finally got some range time with the rifle. I was able to get about 50 rounds through it before I had to call it a day. So far, for the break in period, it runs fine. I had a few failures where the spent brass did not fully eject. I attribute these to not having the stock firmly in my shoulder. The accuracy is sub MOA, so far, when I do my part running FGMM 175 SMK. The only thing I cannot account for, is that the spent brass ejects about 2 to 3 feet forward and 20 degrees to the right. This does not change if suppressed. I am running a standard DPMS carbine buffer and a GL-Shock stock.

For anyone interested to know, the Givati Co USA adjustable gas block I received was slightly out of spec. The hole in which the gas tube fits was a few thousandths too small, likely from the QPQ coating. I fixed it by wrapping some 600 grit sandpaper around a drill bit and working it in the hole until it polished out to spec. Fortunately the rifle is finally finished, because I am tired of fixing things that shouldn't need to be fixed in the first place.

This particular gas block does not have a set screw for locking the adjusting screw. Whether or not that becomes a downfall remains to be seen.

http://www.aim-trax.com/Givati-Company-USA-750-Low-Profile-Adjustable-QPQ-Gas-Block_p_7748.html Adjustable. Steel. Set screws. Low Profile. Made in USA. Affordable.

Thanks 98, and everyone else who has contributed. At this point, it passes all of the safety checks, and it is polished to a higher sheen than a chrome bumper on a '69 Chevelle SS at Barrett Jackson's. So I am going to put a new gas block on when it arrives early next week and then go break it in and see how it runs.

Ok then. Run it wet it shall be. (and here I was thinking SAAMI specs meant something in the fit of factory ammo and chambers...silly me)

Less than 10, one that I owned (but never fired.) They all cycled fine. Is there a concensus that it is normal for new .308 AR's to have chambers so tight that mortaring is required to remove an unspent factory cartridge from the chamber? If so, I will stop messing with it and just shoot the piss out of it for a while.

Out of over 100 new AR rifles I have either handled, personally built, and/or owned, I have never had to mortar the rifle to get an unspent round to eject. Had I bought a new rifle and in the process of initial safety checks found that I had to mortar rounds, said gun would promptly be returned. I do not think that any manufacturer would knowingly allow a firearm in such a condition to leave the production line. Even if they would, I would not, especially when my name is on it.

Everything is new, never fired. The Nickel Boron bolt and carrier are pristine and polished, including the bolt face. I have been cycling the FGMM 175's through it. I now have about 200 cycles and either it is getting a little easier to cycle, I am getting accustomed to it, or I am building extra muscle. I am going to try to put some rounds down the barrel next week.

Whether or not this is true, back when I purchased my suppressor from them a few years ago, they were selling over 50,000 cans per year, out of a residential home! I didn't want to conduct my business over the internet, so went to the owner's home office to make the purchase and pick up the can once my form 4 came back. Back then he had a very large pile of suppressors stacked on the shelves waiting for form fours, and said half his garage was full. Now that he has a brick and mortar shop, I can only imagine how much product he must be pushing out the door.

Headspace checks out. It will cleanly chamber the GO gauge. NOGO will not chamber. 1. After the first round of polishing, the chamber is only a little better - One mortar attempt to eject instead of 3 - 5 attempts. 2. After the second round of polishing, the chamber is still tight, requiring the round to be mortared to be ejected. I am using a 308-AR Chamber Maid chamber brush, Flitz, and jeweler's polish. 3. I changed to a new Chamber brush and polished for a third time to no avail. In total, a brush was spinning inside the chamber for 25-30 minutes with all three polishings combined. The chamber needs more than polishing. 4. I chambered several other types of 308 ammo, and the FGMM 175 SMK factory ammo could be ejected without mortaring, but still took considerable effort on the charging handle to free the round. Maybe it will wear in with some firing? I don't know. Picture after second polish

So far, the dealer has not yet received a response back from BATFE. When I was there the other day, he showed me a printout of a PDF for one of their e-filed SBR's and it had the stamp on it (meaning the original document with the stamp on it was likely scanned by BATFE, and emailed as a PDF with the appoval.) He and several people in the shop were having the same debate about it as we are having here. Is this "copy" of the of the orignal document with stamp all that will ever be received, or will they eventually mail the original? At this point, I guess no one really knows.

That was from a Class III dealer, who was working to confirm.

What I am hearing is that electronic filing and electronic approval is all that you get. The PDF in the email is all you will ever receive, no physical stamp any more. E-file, E-approval, E-stamp. Done.

I agree, considering that I own and run two forums (not associated with firearms). But in a search here, I did not find any historical negative/relavent contributions relating to my particular issues, though I am sure they probably exist. As with any forum, new members not accustomed to different search and logging algorithims will not always be able to find the information they may be seeking, so newer posts on the same topics can somtimes be beneficial, though annoyingly redundant for more tenured members. ::)

Thanks for the information. After talking with a friend about it for a while, I have decided to use this barrel as a learning tool, especially since I bought it at wholesale price. The value of learning something from it will exceed the price I paid for it. Once the gauges show up (thankfully later this week), I will post any of my learning eperiences here, good or bad, so that others can hopefully learn for free.

It is not a melonited barrel. It was definitely black, gritty machine oil. I generally clean them after installation (except for the exterior of the barrel extension), and have never had a problem with any barrel I have purchased. In this case, the barrel still has a very tight chamber after cleaning. As for the tools suggested by Robocop, I am not inclined to fix what I consider to be a manufacturer's issue. Of course, maybe this is normal in 308AR's, and I just do not know it. I am comparing my first 308AR build to seven previous years of AR15 builds without any similar issues.

Since my .308 gauges have not yet arrived, I have not been able to headspace this barrel bolt. But I was notified yesterday morning by one of my manufacturers that they were dropping BHW as the supplier of their custom proprietary profiled barrels due to the fact that "[we had] too many issues to fix in each shipment." It was nagging at me, so I pulled the barrel to inspect it more closely, and this is what I found: 1. It was coated inside and out in black machine oil. I spent nearly 20 minutes cleaning this from both the inside and outside of the barrel. (I never had this occurrence with any of the other BHW barrels, or barrels from any other mfg.) 2. During cleaning, fibers from the patches, swabs, and bore snake kept getting pulled off at the gas port. (Something else I have never experienced before.) 3. The chamber is dull. It has no shine or reflectivity, unlike every other barrel I posses. 4. Just look at the picture of the extension, which is from only 20ish cycles of the BCG. There is also a photo of the bore to show the visibility of the gas port. In person it looks a bit ragged. I think this is getting returned and will be replaced with a Rainier UltraMatch 16"

The rounds look fine. There are some minor scrapes (not gouges) on the brass from where they pass over the ramps. The barrel and bolt came from the same place, but I have not headspaced it yet...still waiting on the guages.

I have one of the commonly found Black Hole Weaponry 18" 1:11 .308 barrels installed on an Aero M5 set. At this point it does not seem to matter what factory ammo I chamber, the unfired rounds must be mortared to eject. The rifle is unfired to this point, so I have no other information that might relate if fired. So far I have tried Federal GMM 175, German DAG, and Winchester White Box, and all must be mortared to eject. All of the rounds would chamber normally from the magazine, and the Surplus Arms NiB bolt carrier rides smoothly. If I hand chamber a round into the barrel and press firmly, it only takes a small bump for it to fall free of the chamber. If I let the BCG slam home on the round from the bolt catch, it must be mortared to remove. Is anyone else having this issue with one of the BHW barrels? I have never experienced this with any of my 5.56 BHW barrels.

The GL-Shock stock weighs 10.8oz w/o the saddle or 13.65oz with it. You can get one on amazon or from a few other vendors for less than $100 shipped free. Saved you some weight and money!

Those are nice made-up quotes (except for the first one, which is factual and the only quote you got right.) Interject or include? I simply answered questions people asked following my posts. If you go back and carefully read my posts, you will note that it was very rare that I wrote "I" or "we" as it pertained to what I was physically doing, including your erroneous quotes. As I stated in my (which is where all of this seems to be emanating from), I build AR-15s, which happen to be by request from others. Now I need to build a 308AR to test before I lay one in the hands of the community who use them in competitions and training, in which I generally participate in as an observer to evaluate my builds. Occasionally I train and compete. Draw attention to myself (so says the guy with more posts than anyone else)? No. I was simply tying to be detailed in relaying information about the people I serve in the hope of getting a good basis of opinions so as to improve my first build of a 308AR. But instead I get "Dickhead fo the Month" giving me the third degree because he cannot comprehend my posts, or worse, seems to not like what the people I deal with call themselves. Talk about shooting the fucking messenger. Before you start pointing that obviously crooked finger at others, take a good hard look in the mirror.

There it is. You're "that guy." The one who questions the person instead of the data provided. How much does a person's experience matter if the data is factual? Facts are facts, regardless of who presents them; whether it be a three year old child or an octogenerian, or someone with physical experience vs. someone with technical experience vs. someone with Holiday Inn Express experience. Facts still remain facts. Continue your attacks if you feel that will somehow change facts. Suum Cuique But since you seem to like being the old lady who cannot stay out of your neighbor's business: Iraq/Kuwait 1 South America (Panama/Columbia/Venezuela) One other Don't worry though, I won't ask about any of your relevant experience, because it doesn't make any difference. Only the facts do. I'm done here.