veirfy it's an SPC6.8 II chamber

M4 feedramps on anything that is not full auto are not needed.

i agree except with one caveat.

Ballistic tips tend to stick.

M4 ramps are not needed. Unless FTFs bother you. If those bother you, then they are needed.

OK, Shifty, how about some documentation to back that up? Since you think people need to spend/waste even more of their hardearned money on this magical cure.

Last I checked the AR platform became the second most successful military firearm of all time (the AK doesnt have them either...) BEFORE Colt decided they needed some patent protection by adding those to their barrel extentions.

The only justification is that they give some advantage in carbine gas systems due to the higher cyclical rates and bolt velocities in carbines fired in full-auto. Mag springs may not be able to keep up with the higher cycle rate because of the use of 62 and 75 grn bullets (that gravity/inertia thingy).

If you live in FTF-world, then I would get some instruction on cleaning your rifle and buy some decent mags.

[This message has been edited by Puryear Playboy (edited 4/21/2009 2:45p).]

Why don't you try reading 6.8 - specific forums about FTFs and inaccuracy due to lack of M4.

I wish you were right my friend. But I don't believe you, because I have experienced problems myself. I am putting my money where my mouth is, I am getting the feed ramps cut in.

The 6.8 is not the 5.56. That is your first mistake.

keep it civil...

Let me explain further. My understanding, having heard from people who know, is that the 6.8, when originally designed, was specified as necessarily having m4 feed ramps due to the different angle and size of the round.

Even if the round feeds, it can hit so hard that it gets jammed back in its case, or otherwise deformed, and that is going to cause inaccuracy at best.

Sorry if I have been rude.

[note: I am not an expert. I apologize if I have been cross or curt in my replies]

It is my OPINION that you should get M4 feed ramps in your 6.8. Ideally the manufacturer put them in. Otherwise, cut them yourself, or get a gunsmith to cut them.

[This message has been edited by shiftyandquick (edited 4/21/2009 3:29p).]

[This message has been edited by shiftyandquick (edited 4/21/2009 3:30p).]

I guess I should always believe those online forums...I never realized how lucky I was to have put 1000's of rounds through my 6.8s over the last few years and not have all those problems. Wow.

Somebody had better get on the phone to those inexperienced boobs over at Stag and tell them what a bunch of newbs they are...tell them to spend more time on internet forums and maybe they will, one-day, make a decent product...oh, wait a minute...

I'm glad you clarrified that ramps are needed in Your Opinion.

Shifty, ramps where specified in the original specs because the folks that designed the round fired it in rifles that where...Full Auto.

In SBR's no less, which by default were carbines, and they all knew that the only .mil manufacturer (at the time) Colt spec'd ramps in all M4's.

So, of course they included them in their spec too.

keep it civil...

With all due respect, it would be foolish to base the success of a platform on one weapon.

Just like it would be foolish of me to write off a weapon based on my lack of success.

Here is the question that is the key: is it more important to have feed ramps in a 6.8 than a 5.56? True or False.

Forget full-auto. Just consider the question above.

Feeding issues are a function of many things, including the type of bullet, the mags, and the receiver. Feed ramps are a key to KISS operation of a 6.8.

It is my opinion. But it's also the opinion of many others, including some of the most important people in the development of the 6.8 platform.

Just so you know it's not just me:
http://www.ar15.com/forums/topic.html?b=2&f=157&t=172140

True or false? False, IMHO.

After reading that thread I am convinced I must not know what I am talking about. Stag too.

Sorry for spreading mis-information.

Where is my Dremel tool...

Here ya go Shifty. Get after it.

http://www.youtube.com/watch?v=acokf3c-D3k

I can't stand it when people ask why I need an AR. I don't have to have any reason at all! Do you need a car that can go over 70mph? Do you need a 3000 sq ft house? Do you need a boat? NO! You don't need them, but you can have them because this is America, where as long as what you do or own doesn't infringe on the rights of others, you are free. There really are two parts of the country now, one that see this and ones that don't.

NRH, there is a reason or two to own one.

http://www.examiner.com/x-1417-Gun-Rights-Examiner~y2009m2d22-Test-your-knowledge-of-gun-control

Well my Omega Rail came in, it looks like one fantastic piece of machinery. Came with some ladder covers but I don't really need them since I've got my Magpul XTM covers. Can't wait to put it on the Stag (thank the Lord I bought a Brownell's handguard tool).

Talked to LaRue and they said my FUG should ship this week (though I'd be surprised... maybe next week). I'm excited. My rig will be tacticool. Just need some dandy optics now.

I just MIGHT have come upon a couple AA 6.5 Grendel minor cosmetic blem lowers today for a VERY good price. Don't really NEED them, but what the heck.

whats very good + 20%?

$100 or less, but I'm not so sure I'm getting them now. They might have sold out before dad got to make the phone call. We'll see. No biggie if not. I can get lowers.

a pic for yall of my M4

Nice, but chickenwing.

Surefire FH supressor mount?

you look at that and you see chicken wing?

I was looking at the section directly in front of and under it and just happened to notice.

I didn't see a M4 in that picture.

quote:

---

Nice, but chickenwing.

Surefire FH supressor mount?

---

It was her first time shooting, and I'm a big supporter of easing someone in to the big bad world of guns and technique. By the end of the day she was leaning in just enough and lucking her elbows, all it took was leading by example and some gentle tips. (fify and twss protected)

The suppressor mount looking thing is actually a rail mount.

good reason for hands on instruction.

Got confirmation this morning. Two AA 6.5 Grendel lowers coming my way for $75 each! WHOOP!

I want one. Email me the price if you want to sell it.

Staying in the family. I'm probably going to build my dad one to match mine and give it to him as a Christmas present if I can get parts before then. If not, his birthday.

So what's the deal with the Grendel. Is it growing in popularity? I notice that you frequently see 6.8 marked lowers, but I don't see 6.5 lowers very commonly.

Only a couple outfits are licensed to manufacture them, and Alexander Arms owns the trademark. Barrels and bolts are the hardest thing to get right now.

6.5 is not the hottest load you can put into an AR-15 platform (25 WSSM is), but it has a reputation for being accurate and flat out past distances I want to attempt. I think it would make an ideal pig/deer rifle. Take a look at the comparison graphics here:

http://www.65grendel.com/faq.htm

If a ar15 lower says 6.8 on it can it be used with any upper?

Can a 5.56 designated lower work with a 6.8 upper?

I guess what I am asking is shouldn't any lower work with any upper? If the lower has a caliber designated on it, will it work with other caliber uppers?