98Z5V

Nope, not common at all. Sounds like the bolt catch is grabbing the front of the BCG body, and not the bolt face. Get some pics up, as well as more details. You gave us Aero M5 matched upper and lower, and the Aero BCG. What lower parts kit did you put in it, what brand of recoil system are you running, etc... Have you shot this gun yet?

I'm an expert at that procedure. It's her back. All she needs is a pretty forceful hip displacement, then everything straightens right out.

These ones do!...

On the 16" they profiled it at 0.700" diameter 0.700" back from the barrel shoulder. That's common, and they followed SPR specs on it. Allen Engineering makes the collars:

You'll just be mad if you shoot this weekend, but try it out if you want. 5 5/16" for a buffer length is 5.313" long. Your buffer needs to be 5.200" long. That +0.100 thou too-long is causing you some grief. Hell, give it a shot - literally. That way, you'll know if it's the comp. That buffer length is an issue, though.

Yes, my man. Yes it is. I have a few Geissele's myself. I don't buy them anymore, unless it's for some really special build where I'll want something under the 4.5lb combined pull weight. I'll go with the LaRue everytime I can, for something that doesn't need to be over the top. I have a pile of these LaRue's in guns now. They really, really work, and work well. They should be 3 times the price that they are. You won't find a 2.5lb/4.5lb 2-stage trigger that's better, and if you buy something else in that spec, it's a waste of money. No kidding.

Just start with a LaRue MBT2S trigger, and you'll be happy for the $87 that you spend on it. Later, if you feel that trigger is lacking (you probably won't), you can change it out for a Geissele Hi-Speed National Match trigger at around $280.

13 Hours, if you guys get the chance. It's pretty powerful. It's everything that Hittlery lied about during her Benghazi hearings. The ultimate, for a Patriot? You guys are criminals if you don't already own Sons Of Liberty. It's the story about the birth of our nation - and it's what the end of our nation is gonna look like, if we don't somehow change our course... If you've never seen Zero Dark Thirty, find it and watch it. Very good account of the raid on Bin Laden.

^^^ That's serious... Not kidding...

Here's some history on what you have in your hands... This is a nice gun. http://www.smallarmsreview.com/display.article.cfm?idarticles=2649

If you have a 7.000" internal-depth extension on a .308AR, then you need to be running a 2.500" long buffer. That's a straight up AR15 recoil system on that gun, probably with spring, too, so just shiit-can the whole thing. The buffer bumper on the end of that buffer has had the shiit beat out of it, by the looks of it. Dump it all.

I see two HUGE issues right here, fighting each other. First, that receiver extension is garbage. For an AR15, it should have an internal depth of 7.000", not 6 3/4" - that receiver extension is WAY outta spec. Second. 3.250" buffer. That's a great buffer length if you're running an Armalite AR-10 Carbine Recoil System... which has a receiver extension depth of 7 5/8". That buffer is long enough to run on one of those. But it's not gonna run in a .308AR with a 7.000" extension - much less a shorter one, that's not to spec. That recoil system is garbage, and it's the primary source of your problems. Shiit-can it. Dumpster Fire wouldn't be agood enough send-off for that thing. Buy the Armalite AR-10 Carbine Recoil System, install it, and let's start there. I'll be you have no more gun issues. Not with the parts that you've listed, and that gas tube pic - that gas tube is perfect length. Ranier makes good barrels, too. You need this, and you'll be laying out about $65 for all of this: https://www.armalite.com/product/ar10rekit01-6-position-receiver-extension-kit/ Shows out of stock right now, but CALL Armalite on the phone and see if theey can piece a kit together for you and send it to you. Trust me on that. Their number is: Phone LOCAL: 623-780-1050 TOLL FREE: 800-336-0184 Hours of Operation: M-F 7am – 4pm MST

Nope, not at all, with most modern quality scopes. It really helps when you're stretching that .308 out, though. There are scopes that won't dial all the way for 1000 yards, but a 10MOA or 20MOA setup get's them there. I have 10MOA scope mounts on the ones I use at distance, and a 20MOA setup on the short Grendel. That 20MOA that you have isn't a hindrance at all, and with it built in to the upper, that's a bonus. I wouldn't get rid of that upper setup - that's some quality stuff, and it might be worth searching out that lower, just to make it happen.

K-Bay? Did a 3-week TDY to Hawaii in 1995, then again in 2000, but was never stationed there for a tour. I think 3 weeks was perfect for what I wanted to see, but I don't know if I could take living there for a few years... Welcome aboard.

Damn, I was in Tacoma from 1992~2004 - and got the hell out of there when things started really going downhill in the state. It bums me out, bad, too. I loved it there, but I could never live there again.

RIGHT?!!? I was actually looking a cement trucks, too! I don't care if they don't DRIVE. I don't need the thing to MOVE, just tumble brass!!!

How far do you plan on shooting this rifle? That 20MOA can be very, very handy...

Why don't you start by answering this part... that you avoided...

REALLY? Who has been the Jackass throughout this thread?... I think you need to start reading it again, from your very first post... If you want to start slinging the personal insults, I'm good with that. Once I start, I won't let up on you. Know that now.

Small tits are fun, too...

No need to Sir me - I'm just a regular guy like you and everybody else. I'm lucky enough to have two ex-wives that I don't have to pay for - and FREEDOM now from all their bullshiit. Also lucky for the Freedom of space and land nearby, that I can do anything I want on. Freedom to do what I like to do. I'm lucky, and I take advantage of it, and I try to pass on everything that I have to learn the hard way, so others don't have to learn it so hard...

Every rookie season for someone in the MLB, they say that, right? They dream it. How many of them actually really do it? It's few and far between. I think you're worrying about things that you don't need to worry about, for right now. Hell, you don't even have it, so how do you know how you want it to shoot - before you've even shot it? How are YOU going to react when you shoot it? That's an unknown, right now. You might build something that takes you years to learn how to shoot well. It happens. I can tell you right now, for sure, it takes years of shooting and training to lay down behind a new gun, and shoot that thing at 1k yards - and not be far off. Years of shooting and training to know what to do to make that second round even closer, or eventually hit, with a new gun. That's a different world altogether, yet we build guns with that as the primary goal. They don't always do what we plan, or think they're gonna do, once we pull that trigger. You have to know THAT bit of data first, though, before you can move forward with your plan...

You're gonna have to make a telephone call to Christiensen about that one. Nobody here is gonna know, from experience. Never been posted, if anyone has one. Call them on the phone... Might be completely proprietary.

The details are key in that one... Does not include barrel, gas tube, gas block, muzzle brake, bolt carrier group, charging handle or magazine.

That's a fancy comp - take it off. Completely off. Shoot the rifle with a bare barrel - see what happens. That's either gonna point directly TO or eliminate that comp as a problem here. Remove it and shoot the gun. If that's really the length of your buffer, then it's too long, and that IS causing you some cycling problems. Make sure your measurement is right, with that 5 5/16". That's an issue (the issue), if that's it. You need to be running a buffer that's 5.200" long. Period. Rifle receiver extension is 9 11/16" internal depth, too - measure that, to see if they did something funky here. In the past, they've made carbine extensions that are suposed to be 7.000" internal depth - they've made them 7.100" internal depth, and that screwed with the function of one of my builds before I figured it all out.