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Old 10-10-2013, 10:06 PM   #21
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Still havent decided whether my next AR will be a LWRC or a Sig516
Before making the decision, consider also that model 516 is a hybrid. If you are not fully committed to the rear charging handle, the telescopic adjustable stock, and the recoil buffer in the rear, consider the SIG 556. Same gas piston system with the same regulator, takes AR mags, but has a side charging handle, a side folding buttstock, and the recoil assembly up front. To some people the SIG 5xx shoots better with less perceived recoil. I think it is mostly because of the weight shifted toward the muzzle, which is favorable to bench rest shooting. Many civilian shooters like to fire their rifles from a supported position. (I appreciate the balance of the original AR that feels more natural in a dynamic situation, but this is not the topic here) A rational choice can be made only by the individual shooter who understands his own style and needs.
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Old 10-11-2013, 12:19 AM   #22
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The 556 I am not considering for the following reasons:

1) if I get a 516 or a LWRC as i already own copies of those it will simplify my spare parts situation and since with piston I am a bit out of the mainsstream I am determined to do that

2) I once owned a 556 and sold it within a week w/o firing as I despite its strong features ( adj gas, CHF barrel foldable stock) reason being the handguards were terrible moving sqeeking squirming with every grip..etc, replacing them with a SIG only rail would have been an etxra 200 bucks

3) I didn't like the balance since I am a 20 yrs soldier and it felt too weird to me.

But i thank you for bringing up an interesting and much overlooked rifle

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Old 10-11-2013, 01:23 AM   #23
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Another one out, easier to decide. Sounds like youre almost there, good luck.

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Old 10-15-2013, 01:23 AM   #24
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I wish sig would nitride treat their AR barrels instead of chrome lining and phosphate finishing. I think it would create a longer barrel life and increase accuracy.

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Old 10-15-2013, 05:55 PM   #25
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I own a SIG 516 and just got an LWRC M6A2 SPR. Comparisons so far, the SIG has a slightly better trigger, the both shoot < 1 moa, the SPR is quite a bit lighter, I like the ambi controls on the SPR lower better than my 1st gen SIG. It's really a toss up as to which is better. I favor the SPR by a small amount. But if I could only have one it would be the SIG 516 but only because it's cost is $500 less than the SPR.

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Old 10-15-2013, 10:05 PM   #26
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Sam: I have a regualr m6a2: does the M6 SPR have tighteners for upper/lower mating like the Sig does?

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Old 10-16-2013, 02:47 PM   #27
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Sam: I have a regualr m6a2: does the M6 SPR have tighteners for upper/lower mating like the Sig does?
bluez,
I guess I had better read the owners manual again. I didn't see anything about a tighteners the first time I read thru it. I can say this there is virtually no play between the upper and the lower on the SPR.

One thing I left out on my comparison. With the very slim hand guard being so close to the barrel on the SPR I started to feel some heat radiating from the barrel and possibly from the piston system and I did not put many rounds thru the SPR. I have never noticed that on the 516. So I guess I will have to order some additional rails and LWRC rail covers. So the weight advantage of the SPR will be nil after everything is installed.
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Old 10-16-2013, 10:31 PM   #28
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both my other LWRCs have a pretty loose fit between upper and lower. I was told by a company rep that's by design so their uppers are sure to fit on any lower a gov't agency might want to put them on.
Still its pretty annoying, put an Accuwedge on both and now its acceptable

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Old 10-17-2013, 05:05 PM   #29
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I'm glad VLTOR doesn't do that. I have a VLTOR upper build that fit very snug and tight on my sig m400 lowers. All this info has been very helpful and in January I'll be the owner of a sig 516. Thanks.

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Old 10-17-2013, 10:34 PM   #30
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Sam: I have a regualr m6a2: does the M6 SPR have tighteners for upper/lower mating like the Sig does?
Bluez,
My SPR is very tight. On the rear of the lower I found a raised domelike structure with a green circular tip on top that looks like that is what causes the upward pressure that makes the fit of the upper to the lower so tight.
Hope that helps.
Sam
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