Does this come with a barrel nut, or must I buy one seperate

The barrel nut comes with the hand guard and is specific to the type and/or brand of the hand guard.

I suspect that there is not a barrel nut included as it is nit mentioned in any of the specs at other online sellers or on the CMMG site Link https://www.cmmginc.com/product/barrel-sub-assm-16-1-mt-4140cm-sbn-5-56mm/ I would call CMMG to verify PHONE 660-248-2293 web contact link https://www.cmmginc.com/contact/

Will this work the troy low profile gas block

Hi Joseph, Yes it should as it has a .750" Gas Block Size --Features and Specifications: Manufacturer Number: 55DC70A -- 5.56mm NATO (Accepts .223 Remington) -- 1:7" Twist Rate -- 16.1" Barrel Length -- Medium Taper Profile -- Mid-Length Gas Port Location -- >>>>>>>>> .750" Gas Block Size -- 4140 Chrome-Moly Salt Bath Nitride Finish -- Muzzle Threaded 1/2" x 28 TPI -- Black

Richard we already answered this. You're just stating the same thing we said. Be original.......Omg James, Don't you just hate how he obviously has no integrity .. and apparently no pride whatsoever. It's like he is an internet leach popping in an hour after we answer every question to get his 1 point. hahaha

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Joseph - There are lo profile gas blocks available to fit virtually any AR-15 barrel in commercial production. The most common diameter gas block is .750" (Inside diameter) and the most common AR-15 barrel uses a .750" size gas block. There are other sized barrels (.875", for example) and they take a .875" gas block. Low Profile only refers to the outside diameter/height of the gas block, and literally means nothing at all about what barrel it will fit. Lo-Profile gas blocks come in various sizes, to fit the variously sized commercially available barrels. Just remember gas block 'size' is the inside diameter - gas block 'profile' deals with the outside measurements. I'm confident Troy makes a lo-pro gas block to fit this barrel. In fact - here is just what you need: https://www.primaryarms.com/troy-industries-low-profile-gas-block-750-set-screw-style

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Joseph, yes Sir. This "Medium Taper" Mid-Length Gas Block Barrel will work with a low profile Gas Block no issue.

I just looked and it will work as The Troy Industries set screw style low profile gas block is compatible with AR-15 barrels with .750 Inch diameters.

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Is this barrel 223 Wylde?

Hi Sharon, No it isn't. - SPECS - Manufacturer Number: 55DC70A - 5.56mm NATO (Accepts .223 Remington) - 1:7" Twist Rate - 16.1" Barrel Length - Medium Taper Profile - Mid-Length Gas Port Location - .750" Gas Block Size - 4140 Chrome-Moly Salt Bath Nitride Finish - Muzzle Threaded 1/2" x 28 TPI - Black.

sorry its just a .223/5.56 barrel Manufacturer Number: 55DC70A - 5.56mm NATO (Accepts .223 Remington) - 1:7" Twist Rate - 16.1" Barrel Length - Medium Taper Profile - Mid-Length Gas Port Location - .750" Gas Block Size - 4140 Chrome-Moly Salt Bath Nitride Finish - Muzzle Threaded 1/2" x 28 TPI - Black.

It is not Sharon. -- (Features and Specifications): - Manufacturer Number: 55DC70A - 5.56mm NATO (Accepts .223 Remington) - 1:7" Twist Rate - 16.1" Barrel Length - Medium Taper Profile - Mid-Length Gas Port Location - .750" Gas Block Size - 4140 Chrome-Moly Salt Bath Nitride Finish - Muzzle Threaded 1/2" x 28 TPI - Black.

What is the twist rate in this CMMG 55DC70A barrel???

1:7 twist according to the manufacturer's website. https://www.cmmginc.com/product/barrel-sub-assm-16-1-mt-4140cm-sbn-5-56mm/#

The Barrel has a 1:7" Twist Rate---Features and Specifications:--- Manufacturer Number: 55DC70A --- 5.56mm NATO (Accepts .223 Remington)--- >>>>>>>> 1:7" Twist Rate--- 16.1" Barrel Length--- Medium Taper Profile--- Mid-Length Gas Port Location--- .750" Gas Block Size--- 4140 Chrome-Moly Salt Bath Nitride Finish--- Muzzle Threaded 1/2" x 28 TPI---

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Hi Patrick, The Barrel has a 1:7" Twist Rate---Features and Specifications:--- Manufacturer Number: 55DC70A --- 5.56mm NATO (Accepts .223 Remington)--- >>>>>>>> 1:7" Twist Rate--- 16.1" Barrel Length--- Medium Taper Profile--- Mid-Length Gas Port Location--- .750" Gas Block Size--- 4140 Chrome-Moly Salt Bath Nitride Finish--- Muzzle Threaded 1/2" x 28 TPI--- Black

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Hi Patrick The 16.1" Barrel has a 1:7" Twist Rate

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CMMG Barrel Sub-Assm, 16.1" MT 4140CM SBN, 5.56mm

Name: CMMG Barrel Sub-Assm, 16.1" MT 4140CM SBN, 5.56mm
Brand: CMMG
SKU: 3187
Price: 158.49 USD
Availability: InStock

Reviews| 4 Questions & Answers

Model: 55DC70A

Condition: Factory New

Bud's Item Number: 3187

UPC: 815835016153

MFG: CMMG

Questions & Answers (4) Reviews 0 out of 5

CMMG Barrel Sub-Assm, 16.1 MT 4140CM SBN, 5.56mm

**Mouse over image above to zoom any area, or click on image to zoom the entire image.

CMMG Inc. makes high quality parts and accessories for the AR-15 platform. This particular barrel is made from 4140 Chrome Moly steel and features a salt bath nitride finish. CMMG machines these barrels to strict tolerances to ensure high quality and years of reliable service.

Product Information

Gauge/Caliber

223 Remington/5.56 NATO

Length

16.10"

Model

Barrel Sub-Assembly

Chokes

1:7"

Sights

None

Finish

Nitride

Rifle

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Questions & Answers

Q: Does this come with a barrel nut, or must I buy one seperate
Answered

Asked 05/12/2019 05:42 by Joseph D

A:

The barrel nut comes with the hand guard and is specific to the type and/or brand of the hand guard.
See 1 more answer |
Q: Will this work the troy low profile gas block
Answered

Asked 04/28/2019 22:57 by Joseph D

A:

Hi Joseph, Yes it should as it has a .750" Gas Block Size --Features and Specifications:
Manufacturer Number: 55DC70A --
5.56mm NATO (Accepts .223 Remington) --
1:7" Twist Rate --
16.1" Barrel Length --
Medium Taper Profile --
Mid-Length Gas Port Location --
>>>>>>>>> .750" Gas Block Size --
4140 Chrome-Moly Salt Bath Nitride Finish --
Muzzle Threaded 1/2" x 28 TPI --
Black
See 7 more answers |
Q: Is this barrel 223 Wylde?
Answered

Asked 06/12/2018 22:48 by Christopher C

A:

Hi Sharon, No it isn't. - SPECS - Manufacturer Number: 55DC70A - 5.56mm NATO (Accepts .223 Remington) - 1:7" Twist Rate - 16.1" Barrel Length - Medium Taper Profile - Mid-Length Gas Port Location - .750" Gas Block Size - 4140 Chrome-Moly Salt Bath Nitride Finish - Muzzle Threaded 1/2" x 28 TPI - Black.
See 3 more answers |
Q: What is the twist rate in this CMMG 55DC70A barrel???
Answered

Asked 03/21/2018 04:46 by Patrick C

A:

1:7 twist according to the manufacturer's website.
https://www.cmmginc.com/product/barrel-sub-assm-16-1-mt-4140cm-sbn-5-56mm/#
See 5 more answers |

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Model 55DC70A	Condition Factory New
Bud's Item # 3187	UPC 815835016153
Manufacturer CMMG

CMMG Barrel Sub-Assm, 16.1" MT 4140CM SBN, 5.56mm

Current Item

Fiocchi Hornady V-Max Polymer Tip 223 Remington Ammo 50 Round Box