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Discussion Starter · #1 ·
Hi, all.

I’ve recently developed a hankerin’ for a piston-driven AR-type rifle in 5.56/.233. I’ve already got a Colt A2 HBAR with 20” barrel and a RRA Entry Tactical with 16.25” barrel, so I’m looking at getting either a 16” or (probably) 18” barrel for this piston AR.

My initial thought, of course, was the MCX. Seems like people like those rifles and I am a SIG fanboi, so it's certainly an option. But I’ve also been looking the PWS MK1 MOD2, LMT, and LWRC offerings.

I’m still going back and forth between getting an upper for my RRA lower, or just getting a complete rifle. (Benefits to both options.) I’m assuming/hoping someone out there has experience with all of the aforementioned options to help me figure out which way to go.

Primary use will be for blastin’ and having a good time, suppressed and unsuppressed, rather than HD, matches, or 3-gun or anything like that.

Thanks for any tips/feedback!

~ Greg ~
 

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I don't have a Patrol, I have the 11.5 inch 5.56 with the Sig brace, and it's my only AR platform. So anything I say, take with a grain of salt, please.

I'd go full rifle, this way you have the ability to fully swap out the foldable/slidable stocks that Sig offers, because you'll have the picatinny rail on the rear end of the lower. Just makes your rifle that much more customizable.

Also, with the new ATF Letter, maybe you should look at a pistol like mine? Seems like a good time to take advantage of this. And you won't be stuck with a 16 inch barrel, unless that's what you want. Again, just my 2 cents.
 

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I don't have a Patrol, I have the 11.5 inch 5.56 with the Sig brace, and it's my only AR platform. So anything I say, take with a grain of salt, please.

I'd go full rifle, this way you have the ability to fully swap out the foldable/slidable stocks that Sig offers, because you'll have the picatinny rail on the rear end of the lower. Just makes your rifle that much more customizable.

Also, with the new ATF Letter, maybe you should look at a pistol like mine? Seems like a good time to take advantage of this. And you won't be stuck with a 16 inch barrel, unless that's what you want. Again, just my 2 cents.
I read the ATF letter and it appears to be SB specific. Does anyone know if this covers all non modified pistol braces by all manufacturers? Thanks in advance.
 

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The SBX, which is what comes on the Sig is made by SB Tactical, Sig just puts their name on it.

It is a good technical question though like is a scion still a Toyota? Lol. I do wonder how many ATF agents know the difference, or know that they're same manufacturer, but with Sig name on it? Alot of people, ( I bet some ATF guys, too) think SB stands for Sig Brace, not for SB Tactical

Lotta smart cats on this forum, someone will school us.
 

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The SBX, which is what comes on the Sig is made by SB Tactical, Sig just puts their name on it.

It is a good technical question though like is a scion still a Toyota? Lol. I do wonder how many ATF agents know the difference, or know that they're same manufacturer, but with Sig name on it? Alot of people, ( I bet some ATF guys, too) think SB stands for Sig Brace, not for SB Tactical

Lotta smart cats on this forum, someone will school us.
Thanks for the info and appreciate it. I had no idea that they were one in the same.

I also had no idea Scions were actually Toyotas, lol. Just a GM guy watching them race past me on the way home most days.
 

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The PWS, LMT and LWRC are some fine piston driven guns. I've owned PWS MK220 for years, and it's totally reliable - and a very sweet shooter. I don't have 1st hand experience with LMT & LWRC, but know others that are happy-as-heck with their rifles too!

I've also lived through the MCX unpleasantness over the past couple years, and still luv my MCX with her 16" 5.56 and 9" 300Blk setups.

Comparing these guns could be a lengthy note, because they're actually very different, so here's an initial 30,000ft look.

SIG's new MCX platforms offers more setup flexibilities with easy barrel lengths & calibers, etc.

MCX should be quite a bit lighter, when comparing equal configurations.

MCX may be more difficult to find exactly the pistol you want, and probably more coin too.

MCX has fewer open source parts, and more proprietary components.

Yeah, MCX is just different - in both obvious and subtle ways.

I guess your choice may be how you feel about getting into the vast world of ARs. My 1st AR was the mil-spec standard Colt 6920, because I wanted to start with a classic. Now, MANY years later, I'm a lot more interested in playing with new stuff...

Cheers
 

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KC pretty well covered it all! My only comment is if you are wanting an AR platform, the MCX is fairly far from that. The 516 would be more comparable to the PWS, LMT or LWRC offerings. Not to say an MCX wouldn't make a great choice, just not so much an AR pattern gun.
 

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Good point, SIG P516 is another great option!! My 516 was born a 10" pistol, and has morphed into an SBR.

Hereis the butt stock switch after receiving her approved Form 1



She's now our much luved & trusted home defense rifle. (MCX 300Blk SBR is in training for that position)



We added the 14.5" Upper to have a 516 travel gun.

Cheers
 

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Discussion Starter · #12 ·
Sorry for not responding yet. I wasn't receiving any notifications (either via email or Tapatalk), so I just assumed nobody had posted. Good thing I looked! :)

KC pretty well covered it all! My only comment is if you are wanting an AR platform, the MCX is fairly far from that. The 516 would be more comparable to the PWS, LMT or LWRC offerings. Not to say an MCX wouldn't make a great choice, just not so much an AR pattern gun.
Okay, yeah... fair enough. :) I guess I should have stated what I was really looking for: something that accepts AR mags (I've got a billion of them), chambered in 5.56, uses a piston system, isn't an AK-type (including Valmets, Galils, etc. - have those already) or a Tavor/X95 (have one), or an FN SCAR rifle (too f-u-g-l-y), or anything else along those lines. I want something that's AR-ish, whether it's an actual AR or something that uses similar bits and pieces and has the same "feel" as an AR, like the MCX.

I do like the modularity of the MCX... but I also liked the advertised modularity of my MPX when I bought it (a Gen2) about a year and a half ago. And SIG still hasn't released the different barrels, etc. to my knowledge. Or, if they have, availability is always "5th of Never." Is SIG more on the ball when it comes to the MCX bits and pieces? And I ain't gonna lie... the issues with the carriage assembly is a little off-putting, though as long as SIG is taking care of people I suppose it's just a part of doing business.

And I do see the appeal of the MCX pistol with brace. My MPX is a pistol and has a brace and I also have a Galil ACE pistol with a brace. Not sure I need another pistol with a brace... but I'm not sure I don't need another one, either. You know how it goes. :)

I've been looking more and more at the various AR uppers and rifles out there and I keep coming back to the PWS MK116 Mod2 rifle. I've seen it advertised as low as $1749, which puts it about on par with the MCX Patrols I've also been looking at. I think one of our local shops might have an MCX rifle, so I'll have to go check it out in person to see how it feels. I sorta doubt anyone around these parts will have a MK116, but I guess I'll never know until I ask.

I'll keep checking things out and if it comes down to it, I'll just flip a coin. That's worked for me in the past. :p

Thanks for all the great responses, folks!

Cheers,

~ Greg ~
 

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While KC alluded to the recall, I'd like to be sure that the OP understands there was a "don't shoot it" recall on some of the MCX production run.

So I'd suggest having the "naughty" serial number range written down prior to buying any MCX, or asking the seller to show you the bolt carrier. Then, if you know what the new one looks like, you can tell right away if it has the correct bolt carrier assembly.

As for me, I owned an MCX for less than 3 hours before I learned of the recall. And I think I have an early production MCX since the handguard has zero-none-zilch markings for the gas settings.

But I have the right parts in it now and am a happy owner.

Bart Noir
Who is still puzzling out which optic to put on all that rail.
 
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