Matt.Cross

Fixed it for you. Nice rifle!!!

Jgun was precisely right in the way he explained it. Timing just refers to the way a threaded object is oriented at the end of it's travel. To show you an example, let's use my muzzle brake. Lets say I want to mount my brake WITHOUT using a crush washer, this means my muzzle brake will thread all the way back to the shoulder at the back of the threads on the muzzle. If I get my brake threaded on and tightened to the 65 ft lbs recommended and notice that the holes intended to be on TOP of the brake are on the bottom or to one side, my brake will have to be timed. So lets say for the sake of example that I notice that the holes are 90 degrees counter-clockwise from where they are supposed to be. I will need to know exactly how much material to remove from the back of the brake in order to get 90 more degrees of rotation. In my case, I know my brake is thread at 24 threads per inch, which makes the math very easy. Every full 360 degree rotation moves my brake towards the chamber end by .0416 (or 1/24th) inches. We need: 90(degrees we need to rotate) / 360(full rotation) = .25 (number of rotations needed) We'll get: 0.25 x 0.0416" = .0104" So by the math we can see that for 90 degrees of rotation, we can remove .0104 inches from the back of our brake to time it correctly. <thumbsup>

Let me start with a disclaimer: I'm not trying to start an argument or be a smarty-pants, I'm simply opening myself up to the possibility that my way of thinking isn't correct, and I want to know the math behind your conclusion. Having said that: I'm getting different math here, to me 24 tpi means that one full revolution is 1/24th inch linear travel, and for me, 1/24th = .0416" decimal. Using my (possibly flawed) math, 1/4 turn comes to .0104" linear travel. Am I way off base or what? This is really important because I'm getting ready to have a muzzle brake timed and I'd like to know the correct way to calculate how much to mill off the back to yield X degrees of rotation.

I know, I know... <dontknow> ... but I was just so excited I had to post and didn't have time to locate my camera and take pics and post them. However, as a reward for your patience, I will post one picture of JUST MY HAND all by itself, as well as pics of the bolt carrier. I think we need to have a 308AR meet & greet, the BBQ would be fantastic and everyone would get to shake my hand! (just imagine <laughs> ) Well anyways, the gas key is on it's way free of charge, so I'm just waiting for it to get here.

I just got mine in the mail, and this beast is NICE!!! It is noteworthy though that when you call and order one, you should probably specify that you want the gas key and the firing pin retainer to ship with it. Pictures will be posted here pretty soon... Hopefully in another week's time, I'll have my matched barrel & bolt, will go get my brake timed on my barrel and then it's off to get a range report and pictures of my finished build.

Amen to that. I haven't seen pictures yet either. Tar and feathers are forthcoming if I don't see some pictures here soon.

If it's a live-or-die issue, the Young Mfg. bolt carrier has the assist serrations milled in it. I myself agree with the consensus that if that round isn't seating, the issue should be remedied instead of compounded.

I'm in exactly the same boat, only I gave in and went ahead and bought the Young Mfg. 308 bolt carrier. The SI bolt carrier is still on order but I won't have to wait for it to get here to finish my build. SI has reassured me that all we are waiting on now is for their heat-treating process to be completed and then they will finish up our bolt carriers & ship them to us. They even encouraged me to keep calling & checking on my order.

This is one sad, sad country. There's nothing inappropriate about letting homosexuals marry, but if somebody wants to display their crude sense of humor, that's just wrong somehow. There just aren't words to express the level of stupidity prevalent in our government.

In the interest of not knowing telling more than most want to know, I obscured some rather colorful technical details... <dontknow>

LOL I was getting ready to comment on how I've been concealing at least one large object in my pants since my teens... ??? <laughs> <lmao>

I think I may have just found my new carry pistol!! Thanks Drew! <thumbsup> <laughs> <lmao>

I decided that I can't wait for the FailZero coated bolt to arrive, so I've ordered a Young Mfg chromed BCG for the MA-TEN build. Since my Magpul MIAD is on the same order as my FailZero bolt, I've ordered a CAA UPG16 grip to use in the meantime... Once I get my MIAD, it may or may not go onto the MA-TEN, depending on which one I like better. The wait is really killing me, I'm dying to have my parts so I can get this baby built and take some pics and post specs.

What a nightmare... makes me glad that so many barrels on the market ship preassembled.... ;D

You just barely saved yourself on this one, a first post of this kind is a crime without pictures.... <laughs>

That sounds like significant trouble just to replace a barrel extension, I would think it would be more simple to just install & headspace the barrel extension and then cut the feed ramps.... but, I digress that I'm not a barrel-maker.

Welcome to the forums! We're always happy to see another service member join, so thanks first of all for your service! The rifle at the top of the page is the military's (Army & Marines currently) new field trial replacement for the M24, it is the KAC M110. That is a suppressor on the muzzle, it's uniquely designed to work with KAC's proprietary gas block for that rifle. I would think that the easiest way to be accuracy capable AND able to shoot large quantities of surplus ammo would be to have an individual upper assembly dedicated to each use. Most surplus ammo is jacketed and may well degrade your barrel and limit it's potential, which is something I'm guessing you could do without. At the distances you are describing, it seems that 16" and 18" barrels are plenty suitable for what you're wanting to accomplish though. This of course is only my opinion, but for what I paid for my match barrel, I'm not going to take any chances on ruining it. It would be much less expensive for me to build another upper with cheaper components and shoot surplus through it instead.

I have just ordered two of these.... ... and four of these... Can't wait! I've also heard that I have two scopes and my barrel for my build coming in, if SI doesn't start shipping their coated BCGs within two weeks, my build will be completed with a chromed bolt from Fulton Armory. I'm really excited! Once the MA-TEN is together, I've decided to make a .308 mock-up of the Mk12 Mod 0 SPR, hopefully complete with suppressor.

I'm very interested! I've had very minimal training (breaking common holds, breaking chokes, etc. etc..) but never got heavily involved because of the cost. Now that I could probably afford it, my schedule is the primary obstacle. I'd love to have somebody to spar with and have informal lessons though.

You can't get it into sheeple's heads that when bad people have bad intentions, THEY WILL FIND A WAY. It doesn't matter if they have to kill you with a sharpened spoon, they will still do it because changing the law will never change their motive. My $.02 anyways.....

Taken care of! <thumbsup>

This topic has been moved to Optics & Mounts, BUIS,Sights. [iurl]http://308ar.com/forum/index.php?topic=1809.0[/iurl]

Only if you're not building brothers and sisters to keep it company.... <thumbsup>

Exactly. I'm never so happy as when someone else comes down with this terminal disease.... <thumbsup>

I can see a raised edge on the ejector bore, I guarantee that when the ejector is recessed and the bolt slams home, the brass is being imprinted by that raised edge. JMHO. <thumbsup>