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New From SIG SAUER: Suppressed 300 Blk Upper

Chris Heuss - comments No comments

SIG SAUER’s adding a suppressed upper receiver to their lineup: the SUR300. The new upper — chambered in the ever-so-chic 300 blackout (300blk) — fits the SIG MCX and a standard AR15 lower. The MCX upper has some cool features:

– 6.75” Cold Hammer Forged Barrel

– Permanently Attached 19 Baffle Titanium Suppressor

– Free Float M-lok Handguard

– Short Stroke Gs Piston

– Tunable Gas Block

– Cycles Sub and Super Sonic Ammo

 

It also comes with SIG’s Matchlite Duo two-stage trigger, as well as an adapter that lets you remove the buffer tube and accept SIG 1913 folding stocks.  Bolt and charging handle are included.

 

 

From sigsauerguns.com:

“This is a new OEM Sig Sauer MCX Conversion Kit that includes an integrally suppressed MCX upper receiver, adapters to convert the lower receiver to accept the MCX upper receiver, and a Sig Sauer two-stage trigger. The trigger installation is required to ensure proper operation of the MCX upper receiver. Using your existing trigger is not recommended and may lead to malfunction.

The suppressor is pinned and welded meaning that the overall length is just over 16”. Putting this on your rifle will not make it an SBR.

Note: All NFA Rules apply. This item will require a Form 3 transfer to your local dealer and then a Form 4 transfer to you. Make sure you can legally own this item before purchasing.”

Specifications:

SKU: UAMCX-9B-300B-SRD

UPC Code: 798681605811

Caliber: .300 Blackout

Manufacturer: Sig Sauer

Sights: None

Frame Finish: Black

Barrel Length (in): 16.8 in OAL

Accessory Rail: Not Applicable

More from The Truth About Guns:

Gun Review: SIG SAUER MCX Rattler SBR

Hands on with the new SIG MCX Virtus

Gun Review: SIG SAUER MPX Copperhead 9mm Pistol

Gun Review: Lone Wolf G9 AR-15 Lower Receiver for GLOCK Magazines

Gun Review: Fulton Armory FAR-15 USGI A2 Upper Receiver Assembly

New From FightLite Industries: STEP-22 Receivers and Integrally Suppressed Ruger Receivers

SIG SAUER Announces 3.5-Inch Barrel MPX Copperhead 9mm PDW

300 AAC Blackout: Belle of the Silencers Are Legal Ball

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Chris Heuss

Chris was born and raised in Austin, Tx where he still lives with his wife and son. Chris grew up exploring and surveying caves with his father for the Texas Parks and Wildlife Department. He is Co-Owner of Black Collar Arms.

0 thoughts on “New From SIG SAUER: Suppressed 300 Blk Upper”

  1. thanks nra

    all they had to do was withhold comment for a few weeks until it all blew over and everybody forgot about it just like it always does

    but no

    now theyve opened the biggest 2nd amendment can of worms weve seen in decades

    we still have no idea who did the shooting and why

    this investigation is being run by the same fbi that we now know for a FACT conspired with our intelligence agencies to take down the president because they disagreed with him ideologically

    oh yeah and anybody remember fast and furious

    THEY *CANNOT* BE TRUSTED

    its still at least as likely as not at this point the whole vegas thing was concocted and perpetrated by leftist new world order types to get gun restrictions like this implemented in the first place

    this whole thing could end up being fast and furious ll

    and now we appear to have the preeminent gun rights advocacy group in america going right along with it like a bunch of MORONS

    the lesson to be learned from this:

    never ever let a perfectly good opportunity TO JUST SHUT UP pass you by

    Reply
  2. I started out with the power stroke. But now that I’ve clearly entered the geezer zone, I ‘ve switched to canted slingshot – just works better with weaker hands. I would consider non-dominant thumb on slide lock, but location of slide lock varies so much between guns.

    Reply
  3. Keep your bumpstocks and cranks. In 90 days, throw them over the fence of the politicians that approved this nonsense and call in an anonymous tip.

    Reply
  4. Just pray that you never have to send it in for repair. I sent a 7 shot .357 in that was locking up. Got it back with the front sight indexed at about 1 o’clock.

    Reply

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