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kyrin88
05-28-09, 08:12
I just bought a new colt 6520 rifle and I am thinking of getting something just as light or similar with a m4 profile barrel with flattop. all of my AR's are flattops, but i wanted to try out the irons this time.it turns out that it is not for me, because lack of ability to use optics and a little bit of the look. So right now I have a 6520 upper that i am trying to get rid of or trade:confused:(pm me). What upper do you guys think i should get around that weight. I really like the lmt uppers or the bcm uppers they are nice. Thanks :p

ST911
05-28-09, 10:43
Just replace the upper receiver with a flat top.

LMT and BCM are GTG, but you already have a complete carbine from the top of the heap.

kyrin88
05-28-09, 11:18
Yes i realize, but i want a flattop and can only do it right now for a trade or sale. I have owned about 5 ar-15's and i must say that colt does have the best fit, no play between the receiver and very accurate. I took it to the range once, it took me 3 shots to sight in and i was hitting 1 inch groups at 100 yrds, it truly out shot me. I only shot 40 rnds and all went into a 3 inch group at 100. Iron sights are cool but i want a flattop for my optics.

ALCOAR
05-28-09, 14:55
Forget about the kiss 6520, where can i find your bed cover.....pink, purple...unreal fushia, now that is a chic magnet! J/K. Its only a matter time til someone tells u this, but if i were u and had to have flattop.... i would either buy a bcm m4 f-t upper for 110 or maybe if u have coin a vltor mur/larue stealth and swap with just the stripped a2 u have currently...secondly u can always go to specialized and beg to buy a stripped m4 for prob. close to 400 - 425. I would stick with a bcm for 110...truly mil-spec, finish imho other than the finishes on lmt mrps are the best ive seen. For some reason once u decide to grab an optic-ready carbine,9/10 times anything close to a kiss usually goes out the window.

Turnkey11
05-28-09, 21:18
Id replace the upper receiver only and stick with the pencil barrel and other associated parts. Quick and easy job, takes 5 minutes max to knock out the gas tube, throw upper in vice, break torque on barrel nut, remove barrel, and reverse procedure on your new upper.

Molon
05-28-09, 21:49
You’re going to have a difficult time finding a flat-top upper with a quality barrel that doesn’t weigh more than your 6520 barrel without going to an SBR. Even a Colt 14.5” M4 barrel weighs more than the 16” light-weight barrel on the 6520. A Colt 16” M4 profile barrel weighs 6 ounces more than the 16” 6520 barrel and since most of that weight is leveraged at the end of the barrel it feels like more.



Colt 6520
http://www.box.net/shared/static/vl52xkvq8r.jpg


Colt 16” M4 profile
http://www.box.net/shared/static/6po0sh394g.jpg


Colt 14.5” M4
http://www.box.net/shared/static/11jjy3t2du.jpg


If you really want a flat-top upper, you should seriously think about converting your 6520, as several others have already mentioned. Find a Colt M4 upper receiver to change-out with your A2 upper and you’ll find yourself with a very handy, light-weight carbine. You can even add a free-float handguard later on and still have a very light carbon.



http://www.box.net/shared/static/o13dql4ocn.jpg




http://www.box.net/shared/static/xsi579xo9v.jpg




http://www.box.net/shared/static/f0becu67pf.jpg



http://www.box.net/shared/static/y5rljba59z.jpg



http://home.comcast.net/~gocartmozart/16_LW_free_float_21_resized_recessed_frame.jpg

kyrin88
05-29-09, 01:35
You’re going to have a difficult time finding a flat-top upper with a quality barrel that doesn’t weigh more than your 6520 barrel without going to an SBR. Even a Colt 14.5” M4 barrel weighs more than the 16” light-weight barrel on the 6520. A Colt 16” M4 profile barrel weighs 6 ounces more than the 16” 6520 barrel and since most of that weight is leveraged at the end of the barrel it feels like more.



Colt 6520
http://www.box.net/shared/static/vl52xkvq8r.jpg


Colt 16” M4 profile
http://www.box.net/shared/static/6po0sh394g.jpg


Colt 14.5” M4
http://www.box.net/shared/static/11jjy3t2du.jpg


If you really want a flat-top upper, you should seriously think about converting your 6520, as several others have already mentioned. Find a Colt M4 upper receiver to change-out with your A2 upper and you’ll find yourself with a very handy, light-weight carbine. You can even add a free-float handguard later on and still have a very light carbon.



http://www.box.net/shared/static/o13dql4ocn.jpg




http://www.box.net/shared/static/xsi579xo9v.jpg




http://www.box.net/shared/static/f0becu67pf.jpg



http://www.box.net/shared/static/y5rljba59z.jpg



http://home.comcast.net/~gocartmozart/16_LW_free_float_21_resized_recessed_frame.jpg

Thanks for the advice Gentlemen, but I am not sure that converting the A2 to a flattop is a good idea for me. I want to stick to all factory parts and there aren't any qualified colt armorers that I know of in Miami. I really wish that colt would make a light weight Gov carbine with a flattop. Molon I really like those light weight colts with the fattop, where were those done?

N2CH_556
05-29-09, 01:45
You could always send it to ADCO to have the swap done.

You could find a Colt upper and send it to them along with your 6520 upper.

Or, send 'em your 6520 upper and buy one of the flat-top uppers they have available (RRA?) and pay for disassembly/reassembly of your upper ($35) + whatever they charge (if anything) to swap uppers.

Don't forget about shipping both ways.

Instant, badass, lightweight, flat-top goodness.

bkb0000
05-29-09, 01:49
Thanks for the advice Gentlemen, but I am not sure that converting the A2 to a flattop is a good idea for me. I want to stick to all factory parts and there aren't any qualified colt armorers that I know of in Miami. I really wish that colt would make a light weight Gov carbine with a flattop. Molon I really like those light weight colts with the fattop, where were those done?

my guess is molon does his own work. i've been wrong before, though.

i'll do it for you for free, all you pay is shipping to me... return shipping not available at this time.

anyway, converting it will set you back $100-$130 bucks.. buying a new colt upper right now will set you back around $800

what makes more sense?

rob_s
05-29-09, 05:42
I have a 6520 converted to flattop. That's the way to go.

I bought the flattop from ADCO, as well as a DD M4 rail and had them do the swap and install the rail all at the same time. I also went with a 9.0 rail at the time and had them shave down the FSB to fit under it.

dcmdon
05-29-09, 08:50
don't do the M4. The tactiCool factor is about the only reason to want those cuts.

Think about it. You get the weight of the Hbar, with a nice hinge point right in the middle. It makes no sense unless you are actually going to use a grenade launcher.

Don

R Moran
05-29-09, 09:15
I'd contact Ken Elmore and see if he has a Colt flat top around, Brownells has them, but if you buy it from Ken, he generally will install it for free.

Look into his operator package, where he shave the front sight, and uses a LaRue rail.

IIRC, the front sight base on the LTWT barrel is not compatible with a flat top.

Bob

ST911
05-29-09, 11:26
IIRC, the front sight base on the LTWT barrel is not compatible with a flat top.Bob

Correctable with a taller FSP.

R Moran
05-29-09, 11:42
Correctable with a taller FSP.

That is what I figured. Never had to deal with the problem. But from what I gathered, most thought it was a less then ideal fix, for the Bushmasters w/o F marked front sight assemblies.

Either way its just something to be aware of, thats all.

Bob

kyrin88
05-29-09, 12:11
Yea, I dont think that i am going to convert the 6520 upper to flattop. I rather just get the M-4 upper and skip all the hassle. Pm if interested

Al U. 5811
05-29-09, 12:29
I have a 6520 as well but kept it simple as possible as an HD/grab and go. A simple white light is all for now. I might go with a T-1 for RDS but still undecided on mounting options. They are a nice alternative to a loaded up carbine. Overall a very good gun.

ST911
05-29-09, 12:31
That is what I figured. Never had to deal with the problem. But from what I gathered, most thought it was a less then ideal fix, for the Bushmasters w/o F marked front sight assemblies. Either way its just something to be aware of, thats all. Bob

You bet. It's not a first choice. It isn't a problem, though, unless you have stacking tolerance that make the FSP protrude excessively creating a potential vulnerability.

Popular mod, though. The 6520 with a railed upper receiver and T1 is a heckuva handy fighting carbine.

rob_s
05-29-09, 17:43
FWIW, there is some degree of tolerance and you *may* get lucky with the front sight and not need the taller post.

What Colt needs to do is make a 16" version of the 6933 so it has the flattop upper, .625" dia. barrel, and the F-FSB.

R Moran
05-29-09, 18:10
Yea, I dont think that i am going to convert the 6520 upper to flattop. I rather just get the M-4 upper and skip all the hassle. Pm if interested

I don't think your gonna find one "just as light", as the M4 profile is heavier.

We only offered up some suggestions.

FWIW,
I had an older Colt Ltwt sporter, I asked Ken if he could make it an Operator. He felt there would be too many issues converting the older guns to a flat top, M4 ramps etc. I debated what I wanted to do, and was likely just gonna leave it, but it was pre-ban, and someone from NY bought it, and I was able to get a 6920, for basically 100 dollars more.

I believe the newer guns would be easy to convert.

Rob,
That's been tossed about a lot, I guess no one knows why they won't do it.

Bob

kyrin88
05-29-09, 18:55
I don't think your gonna find one "just as light", as the M4 profile is heavier.

We only offered up some suggestions.

FWIW,
I had an older Colt Ltwt sporter, I asked Ken if he could make it an Operator. He felt there would be too many issues converting the older guns to a flat top, M4 ramps etc. I debated what I wanted to do, and was likely just gonna leave it, but it was pre-ban, and someone from NY bought it, and I was able to get a 6920, for basically 100 dollars more.

I believe the newer guns would be easy to convert.

Rob,
That's been tossed about a lot, I guess no one knows why they won't do it.

Bob

I realize that i am going to have to sacrifice a little weight to get the M-4, but i am sure that it is not that big of a difference in weight( I could be wrong). I am not planning to make it front heavy with all the unnecessary gizmos,a simple flashlight would be suffice for me. For now I am going to try to get it sold or traded for m-4 upper. I myself would love to get a 6920 or lmt, bcm, noveske etc. Right now i am trying to get the upper and rra lower off my hands to raise money to get a decent upper with nato chamber and 1/7 twist.

matthewdanger
05-29-09, 19:18
This started out as a 6520 upper:

http://img98.imageshack.us/img98/469/lightweight1up8.jpg

I put a flat top on it and replaced the half circle carrier with an FN M16 carrier from G&R so basically just the barrel and bolt are left.

kyrin88
05-29-09, 19:29
This started out as a 6520 upper:

http://img98.imageshack.us/img98/469/lightweight1up8.jpg

I put a flat top on it and replaced the half circle carrier with an FN M16 carrier from G&R so basically just the barrel and bolt are left.

I heard that you should stay away from Fn parts, because FN does not make ar-15's or its parts for the civilian market, they are currently contracted to make m-16a2 and a3 rifles for the military, which is why all their control groups are for FA M-16. Therefor all of the Fn M-16 parts such as BCG etc are either rejects from the factory that were bought by second hand vendors or were stolen(which by the way is highly unlikely). Get a BCM BCg i heard good things about them

kyrin88
05-30-09, 07:44
You heard wrong. And listen to Rob_s...quit the silly color/font crap if you want to be taken seriously here.

Shut the hell up you freakin chair commandos. Correct me if I am wrong, but don't be a dick about it. Did you go to college?

Jay Cunningham
05-30-09, 08:04
Shut the hell up you freakin chair commandos. Correct me if I am wrong, but don't be a dick about it. Did you go to college?

Please check your PM's. Let's get this thread back on track.

matthewdanger
05-30-09, 08:39
I heard that you should stay away from Fn parts, because FN does not make ar-15's or its parts for the civilian market, they are currently contracted to make m-16a2 and a3 rifles for the military, which is why all their control groups are for FA M-16. Therefor all of the Fn M-16 parts such as BCG etc are either rejects from the factory that were bought by second hand vendors or were stolen(which by the way is highly unlikely). Get a BCM BCg i heard good things about them

G&R doesn't sell junk. This is one of the nicer carriers I own. It has torx bit gas key screws and great staking.

BCM makes great gear, but I am not worried in the slightest about anything that G&R sells as "FN".

R Moran
05-30-09, 09:37
My understanding was that Grant gets them from the same supplier as FN, not from FN themselves.

Bob

C4IGrant
05-30-09, 21:17
My understanding was that Grant gets them from the same supplier as FN, not from FN themselves.

Bob

Correct.

FN does not make everything in house.

So nothing "stolen or junk."


C4

kingc
05-30-09, 23:19
To the OP:

If your rifle is AS new, you should probably sell it now, since the supply of Colt 6520's is scarce. The price and supply of the 6920 are looking good now. You'd probably do well this way.

Sending your stuff to ADCO or Ken Elmore are two very respectable ways to convert your upper, should your mind change. Ken Elmore does a lot of Colt-qualified work, second-to-none. Adco is extremely quick and high quality.:)

kyrin88
05-31-09, 00:15
To the OP:

If your rifle is AS new, you should probably sell it now, since the supply of Colt 6520's is scarce. The price and supply of the 6920 are looking good now. You'd probably do well this way.

Sending your stuff to ADCO or Ken Elmore are two very respectable ways to convert your upper, should your mind change. Ken Elmore does a lot of Colt-qualified work, second-to-none. Adco is extremely quick and high quality.:)

thanks, you are right. I'm selling it for a low price, because i am trying to get it off my hands. I heard good things about Adco and Ken thanks to the guys on this forum, but I think I am going for the flattop m4, preferably 6920, lmt , bcm, noveske etc.:D