Urgent: Buy or Upgrade my AR?

[Erni]

I need some help deciding if I should upgrade my AR or buy a used but already upgraded gun.
My current AR is a RRA with a free floadting quad rail, 16" mid length gun, 1:9 twist. Bought in 07 when it was a decent setup for a mid length free float gun, not to mention the only one available at Jensens(it was November 07). The gun is STUPID front heavy, probably a combo of the barrel and the insanely large quad rail. So the gun needs a new rail and FSB, and could probably use a new trigger. The gun shoots really well, and made a 5 shot 1.6" group with 55gr PMC, on a windy day, using a 4x Millet scope.
Today I found a Sig M400, 16" 1:7 standard Sig barell at Cabelas and it has a Noveske 11" keymod, Timney drop in trigger and had Magpull plastic BUIS. Light as a feather, super balanced, great trigger. $1200 plus taxes. The gun is used, but did not seem abused, light scuff on the barell and a small nick on the front of the lower. Looks like someone started with an M400 changed the FSB to a low version, added the rail and trigger.

So, to update my gun with the rail and trigger and BUIS we are looking at close to $600 plus I would need the tools to swap out the handguard, and a couple of hours. Provided I get a minimum of $750 for the RRA I break even.

I am a bit stumped, becase new gun!

Help me decide folks!

Thanks.

[hghclsswhitetrsh]

Simple solution. Have both. It's legal ya know?!(for now)

[AR_ART]

Some good points… Me, unless I had some special attachment to the RRA, I'd sell it and buy the Sig. Would just be simpler...

[ray1970]

Here's something else to consider. Maybe some of your weight issues with the RRA are in the barrel. So, even after replacing the parts you mentioned it may still seem a little front heavy. You may end up swapping the barrel out so factor in that cost as well.

[BPTactical]

Or I can re profile and park the barrel for about 1/2 the cost of a new barrel. That thing is probably just a bit under an inch under the handguards. We can skinny it down to .800 or so and save ya some weight.

[Erni]

Thanks for the replies. Totally not attached to the RRA. I did forget that the RRA has a fat barrel so that will account for part of the nose heavy feel. Did any of you add a light hand guard to a heavy barrel? How did the balance feel?

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[ray1970]

I find any AR with a heavy profile barrel to be a nose heavy pig. No matter which handguard you put on it. Personally, I can't tell too much difference between a 7.5 oz handguard and a 15 oz handguard. But I can definitely tell the difference between a 1.5# barrel and a 2.5# barrel.

[ray1970]

Also, just to spread a little knowledge, a heavy profile mid gas barrel will be noticeably heavier than a heavy carbine gas barrel due to that extra two inches of heaviness before the gas port.

[crays]

Just a thought, but if you start changing/swapping bbls on the RRA, it may affect accuracy?

If cost is not an immediate factor, why not buy and try?

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[Erni]

Agreed. Amazing how I realized that after having the gun for a few months. Chit my FAL para has a better balance and feels lighter.

Any thoughts about Sig M400? The specs seem mostly Mil spec, but I see some hate posts out there.

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