Skip to main content
HalloweenPetLawn & GardenTruck & AutomotiveSporting GoodsHorseFarm & RanchClothingLivestockPet & Animal PharmacyToolsPoultryFencing & GatesHome ImprovementOutdoor LivingHeating & CoolingHome Decor & FurnitureOutdoor Power EquipmentTrailers & TowingBoots & ShoesWild Birds & WildlifeToysGift CardsServices Propane RefillTrailer RentalGarden CenterFeed CenterSame Day DeliveryPetVet ClinicPet WashGrooming at PetsenseDog Training at PetsenseTractor Supply RxPet InsuranceWag!

"Savings and Offers"

Weekly AdSaleClearance

"More Options"

Weekly AdWhat's NewTractor Supply AppEarn Rewards with Neighbor's ClubHometown HeroesLife Out Here BlogTSC Exclusive BrandsTop BrandsClearance ItemsBattery FinderOutdoor Power Equipment Parts FinderHitch Finder

Spend $49.99 to unlock Free Delivery on most orders

|
Learn More
Order statusTSC Credit CardsWhat’s newPetsenseWeekly Ad
​

Sign In / Enroll

Get rewarded!

​
Menu

Search

Home

Sign In

Cart
0.0
(0)
0.0 out of 5 stars.
A woman outside with a dog
A woman outside with a dog
  1. Home
  2. /
  3. Sporting Goods
  4. /
  5. Shooting
  6. /
  7. Shooting Accessories & Parts
  8. /
  9. Gun Parts
  10. /

  11. CMMG 5.7x28mm Barrel Kit for AR-Platform with Bolt Carrier Group, 16.10 in., 1/2 in. x 28 Thread, Radial Delayed Blowback

  1. Home
  2. /
  4. /
  5. Gun Parts

CMMG 5.7x28mm Barrel Kit for AR-Platform with Bolt Carrier Group, 16.10 in., 1/2 in. x 28 Thread, Radial Delayed Blowback

Shop all CMMG

  • New Arrival

  • Online Only

CMMG 5.7x28mm Barrel Kit for AR-Platform with Bolt Carrier Group, 16.10 in., 1/2 in. x 28 Thread, Radial Delayed Blowback

Item # 6092435

CMMG CMMG 5.7x28mm Barrel Kit for AR-Platform with Bolt Carrier Group, 16.10 in., 1/2 in. x 28 Thread, Radial Delayed Blowback
CMMG CMMG 5.7x28mm Barrel Kit for AR-Platform with Bolt Carrier Group, 16.10 in., 1/2 in. x 28 Thread, Radial Delayed Blowback
$524.99
or
or

Add this item to unlock free delivery!

Notice:
This Item cannot be shipped to CA, CO, CT, IL, MA, NJ, NY, WA.
Neighbor's Club logo
Neighbor’s Club Members earn points with purchases.

Sign in or Join Now

Shop all CMMG

  • New Arrival

  • Online Only

CMMG 5.7x28mm Barrel Kit for AR-Platform with Bolt Carrier Group, 16.10 in., 1/2 in. x 28 Thread, Radial Delayed Blowback

Item # 6092435

CMMG CMMG 5.7x28mm Barrel Kit for AR-Platform with Bolt Carrier Group, 16.10 in., 1/2 in. x 28 Thread, Radial Delayed Blowback
CMMG CMMG 5.7x28mm Barrel Kit for AR-Platform with Bolt Carrier Group, 16.10 in., 1/2 in. x 28 Thread, Radial Delayed Blowback

$524.99
or
or
financeCard Logo
$44/mo.†  suggested payments with 12 Months Financing or earn $26 in Rewards+ on this purchase.

Add this item to unlock free delivery!

This item is available online only

Delivery to

Free standard delivery on online footwear & Clothing purchases of $49 and over.

​
Notice:
This Item cannot be shipped to CA, CO, CT, IL, MA, NJ, NY, WA.
Neighbor's Club logo
Neighbor’s Club Members earn points with purchases.

Sign in or Join Now

The 16.1 5.7x28mm Barrel and BCG Kit is just the thing for building a carbine length AR in 5.7x28mm using CMMGs patented Radial Delayed Blowback operating system. Unlike typical direct blowback systems, Radial Delayed Blowback not only reduces the weight in your BCG but it results in less felt recoil than a straight blowback system without sacrificing key features like last round bolt hold open. CMMGs 5.7x28mm Barrel and Bolt Kits are designed to be assembled into a Mk4/mil-spec AR15 upper and work with either a CMMG Mk57 lower receiver or Mk4/AR15 mil-spec lower receiver (when using CMMG 5.7 AR Conversion Magazines).

  • 16.1" 5.7x28mm Barrel and BCG Kit is for building a carbine-length AR in 5.7x28mm
  • Uses CMMG's patented Radial Delayed Blowback operating system
  • Compared to typical direct blowback:
  • Reduces weight in the BCG
  • Results in less felt recoil than straight blowback
  • Maintains key feature: last round bolt hold open
  • Kit is designed to assemble into an Mk4/mil-spec AR15 upper
  • Works with either:
  • CMMG Mk57 lower receiver
  • Mk4/AR15 mil-spec lower receiver (requires CMMG 5.7 AR Conversion Magazines)
  • Firearm Fitment: AR-Platform
  • Caliber: 5.7x28mm
  • Color: Black
  • Finish: Salt Bath Nitride
  • Includes: Bolt Carrier Group
  • Length: 16.10"
  • Length Range: 16"-20"
  • Material: 4140 Chromoly Steel
  • Thread Pattern: 1/2"x28
  • Weight: 2.50 lbs
BrandCMMG
Country of OriginMade in USA
Ammunition CapacityN/A
CompatibilityAR-Platform
Gun CompatibilityRifles
Caliber5.7X28mm
Gun Part TypeBarrels
Primary ColorBlack
Product Weight2.50 lb.
Manufacturer Part Number57D0476
No questions have been asked about this product.

No questions have been asked about this product.

Q&As

No questions have been asked about this product.

No questions have been asked about this product.

Similar Items

  1. CMMG 22 LR Barrel Kit for AR-15 with Bolt Carrier Group, 16.10 in., 1/2 in. x 28 Thread, Black Nitride, Chromoly Steel
    0.0 out of 5 stars with 0 reviews
    0.0 (0)

    CMMG 22 LR Barrel Kit for AR-15 with Bolt Carrier Group, 16.10 in., 1/2 in. x 28 Thread, Black Nitride, Chromoly Steel

    $374.99
  2. CMMG 5.7x28mm Barrel and BCG Kit for AR-Platform, 8 in., Black
    0.0 out of 5 stars with 0 reviews
    0.0 (0)

    CMMG 5.7x28mm Barrel and BCG Kit for AR-Platform, 8 in., Black

    $499.99
  3. CMMG 22 LR Barrel Kit with Collar for AR-15, 16.10 in., 1/2 in. x 28 Thread, Black Nitride, Chromoly Steel
    0.0 out of 5 stars with 0 reviews
    0.0 (0)

    CMMG 22 LR Barrel Kit with Collar for AR-15, 16.10 in., 1/2 in. x 28 Thread, Black Nitride, Chromoly Steel

    $249.99
  4. CMMG 5.7x28mm Barrel and BCG Kit for AR-Platform, 5 in., Black
    0.0 out of 5 stars with 0 reviews
    0.0 (0)

    CMMG 5.7x28mm Barrel and BCG Kit for AR-Platform, 5 in., Black

    $474.99
  5. CMMG Forward Assist Kit for AR-Platform/CMMG Mk3/CMMG LR-308, Black
    0.0 out of 5 stars with 0 reviews
    0.0 (0)

    CMMG Forward Assist Kit for AR-Platform/ Mk3/ LR-308, Black

    $17.99
  6. CMMG 5.56x45mm NATO Barrel Sub-Assembly for AR-15, 16.10 in., 1/2 in. x 28 Thread, Carbine Length with M4 Profile, Black
    0.0 out of 5 stars with 0 reviews
    0.0 (0)

    CMMG 5.56x45mm NATO Barrel Sub-Assembly for AR-15, 16.10 in., 1/2 in. x 28 Thread, Carbine Length with M4 Profile, Black

    $224.99
  7. CMMG 5.56x45mm NATO Barrel Sub-Assembly for AR-15, 16.10 in., 1/2 in. x 28 Thread, Midlength, Medium Taper Profile, Black
    0.0 out of 5 stars with 0 reviews
    0.0 (0)

    CMMG 5.56x45mm NATO Barrel Sub-Assembly for AR-15, 16.10 in., 1/2 in. x 28 Thread, Midlength, Medium Taper Profile, Black

    $224.99
  8. CMMG Resolute Upper for AR-Platform, 16.10 in., 5.7x28mm, Armor Black, M-LOK Free-Float Handguard
    0.0 out of 5 stars with 0 reviews
    0.0 (0)

    CMMG Resolute Upper for AR-Platform, 16.10 in., 5.7x28mm, Armor Black, M-LOK Free-Float Handguard

    $1,049.99
  9. CMMG Complete MK3 Bolt Carrier Group, 308 Win, Black Phosphate, Steel
    0.0 out of 5 stars with 0 reviews
    0.0 (0)

    CMMG Complete MK3 Bolt Carrier Group, 308 Win, Black Phosphate, Steel
  10. CMMG 350 Legend Barrel Sub-Assembly for AR-15, 16.10 in., 1/2 in. x 28 Thread, Carbine Length Gas System, Medium Taper
    0.0 out of 5 stars with 0 reviews
    0.0 (0)

    CMMG 350 Legend Barrel Sub-Assembly for AR-15, 16.10 in., 1/2 in. x 28 Thread, Carbine Length Gas System, Medium Taper

    $224.99
  11. CMMG ZEROED PISTOL Grip Kit for AR-Platform
    0.0 out of 5 stars with 0 reviews
    0.0 (0)

    CMMG ZEROED PISTOL Grip Kit for AR-Platform

    $18.99
  12. CMMG Banshee MK3 Upper for AR-Platform, 16.10 in., 8.6Blackout, Black Armor Cerakote Receiver
    0.0 out of 5 stars with 0 reviews
    0.0 (0)

    CMMG Banshee MK3 Upper for AR-Platform, 16.10 in., 8.6Blackout, Black Armor Cerakote Receiver

    $1,149.99

Items You May Like

  1. CZ 16 Round 9mm Luger Magazine for CZ 75/85, Blued, Steel
    0.0 out of 5 stars with 0 reviews
    0.0 (0)

    CZ 16 Round 9mm Luger Magazine for 75/85, Blued, Steel

    $57.99
  2. Ruger 8 Round 6.5 PRC Magazine for Ruger Precision/Hawkeye Long Range Target, Blued, Steel
    0.0 out of 5 stars with 0 reviews
    0.0 (0)

    Ruger 8 Round 6.5 PRC Magazine for Precision/Hawkeye Long Range Target, Blued, Steel

    $71.99
  3. DNZ Products Freedom Reaper Forward Picatinny Rail, Matte Black, Aluminum, 30mm Tube, Extra High Rings
    0.0 out of 5 stars with 0 reviews
    0.0 (0)

    DNZ Products Freedom Reaper Forward Picatinny Rail, Matte Black, Aluminum, 30mm Tube, Extra High Rings

    $206.99
  4. Strike Industries CZ Scorpion EVO Magwell for All CZ Scorpion EVO Models (Except 3+), Black, Polymer
    0.0 out of 5 stars with 0 reviews
    0.0 (0)

    Strike Industries CZ Scorpion EVO Magwell for All CZ Scorpion EVO Models (Except 3+), Black, Polymer

    $24.99
  5. True Precision Inc TP/22 True Profile Barrel for Ruger 10/22, 16.10 in., Black DLC, 416-R Stainless Steel
    0.0 out of 5 stars with 0 reviews
    0.0 (0)

    True Precision Inc TP/22 True Profile Barrel for Ruger 10/22, 16.10 in., Black DLC, 416-R Stainless Steel

    $280.99
  6. Timney Triggers Tavor Two-Stage Trigger, Black, Aluminum/Steel
    0.0 out of 5 stars with 0 reviews
    0.0 (0)

    Timney Triggers Tavor Two-Stage Trigger, Black, Aluminum/Steel

    $299.99
  7. Carlsons Delta Waterfowl Extended Choke Tube for Remington Rem Choke, 12 Gauge, Mid-Range, 17-4 Stainless Steel
    0.0 out of 5 stars with 0 reviews
    0.0 (0)

    Carlsons Delta Waterfowl Extended Choke Tube for Remington Rem Choke, 12 Gauge, Mid-Range, 17-4 Stainless Steel

    $60.99
  8. Top Rated
    Leupold Mark AR Integral Mounting System, Matte Black, Aluminum 35mm Tube
    4.9 out of 5 stars with 26 reviews
    4.9 (26)

    Leupold Mark AR Integral Mounting System, Matte Black, Aluminum 35mm Tube

    $102.99
  9. B5 Systems CAR-15 Handguard, OD Green
    0.0 out of 5 stars with 0 reviews
    0.0 (0)

    B5 Systems CAR-15 Handguard, OD Green

    $23.99
  10. Galco UnderWraps 2.0 Handgun Belly Band, Large, Khaki, Leather/Nylon
    0.0 out of 5 stars with 0 reviews
    0.0 (0)

    Galco UnderWraps 2.0 Handgun Belly Band, Large, Khaki, Leather/Nylon
  11. Leapers Ultra Slim Foregrip, Picatinny, Matte Black, Anodized Aluminum, MTFGP01X
    0.0 out of 5 stars with 0 reviews
    0.0 (0)

    Leapers Ultra Slim Foregrip, Picatinny, Matte Black, Anodized Aluminum, MTFGP01X

    $19.99
  12. B5 Systems CAR-15 Stock for AR-Platform, Mil-Spec, Carbine Style, OD Green, Synthetic
    0.0 out of 5 stars with 0 reviews
    0.0 (0)

    B5 Systems CAR-15 Stock for AR-Platform, Mil-Spec, Carbine Style, OD Green, Synthetic

    $47.99

Customers Also Bought

  1. CMMG Resolute MK4 Upper for AR-Platform, 16.10 in., 350 Legend, Armor Black, M-LOK Free-Float Handguard
    0.0 out of 5 stars with 0 reviews
    0.0 (0)

    CMMG Resolute MK4 Upper for AR-Platform, 16.10 in., 350 Legend, Armor Black, M-LOK Free-Float Handguard

    $949.99
  2. CMMG 300 Blackout Barrel Sub-Assembly for AR-15, 16.10 in., 5/8 in. x 24 Thread, Carbine Length with Multi Role Profile
    0.0 out of 5 stars with 0 reviews
    0.0 (0)

    CMMG 300 Blackout Barrel Sub-Assembly for AR-15, 16.10 in., 5/8 in. x 24 Thread, Carbine Length with Multi Role Profile
  3. CMMG Resolute MK4 Upper for AR-Platform (No BCG or Charging Handle), 16.10 in., 5.56x45mm NATO, Armor Black, M-LOK Handguard
    0.0 out of 5 stars with 0 reviews
    0.0 (0)

    CMMG Resolute MK4 Upper for AR-Platform (No BCG or Charging Handle), 16.10 in., 5.56x45mm NATO, Armor Black, M-LOK Handguard

    $609.99
  4. CMMG Resolute MK4 Upper for AR-Platform (No BCG or Charging Handle), 16.10 in., 300 Blackout, Armor Black, M-LOK Handguard
    0.0 out of 5 stars with 0 reviews
    0.0 (0)

    CMMG Resolute MK4 Upper for AR-Platform (No BCG or Charging Handle), 16.10 in., 300 Blackout, Armor Black, M-LOK Handguard

    $609.99
  5. CMMG 5.7x28mm Barrel Sub-Assembly for PS90 SBR, 10.40 in., M12x1 LH Thread, Medium Taper, Threaded
    0.0 out of 5 stars with 0 reviews
    0.0 (0)

    CMMG 5.7x28mm Barrel Sub-Assembly for PS90 SBR, 10.40 in., M12x1 LH Thread, Medium Taper, Threaded
  6. CMMG 300 Blackout Barrel Sub-Assembly for AR-15, 16.10 in., 5/8 in. x 24 Thread, Carbine Length, Medium Taper Profile, Black
    0.0 out of 5 stars with 0 reviews
    0.0 (0)

    CMMG 300 Blackout Barrel Sub-Assembly for AR-15, 16.10 in., 5/8 in. x 24 Thread, Carbine Length, Medium Taper Profile, Black
  7. CMMG Resolute MK4 Upper, 16.10 in., 338 ARC, Black Nitride Barrel, Aluminum, Black Armor Cerakote Receiver
    0.0 out of 5 stars with 0 reviews
    0.0 (0)

    CMMG Resolute MK4 Upper, 16.10 in., 338 ARC, Black Nitride Barrel, Aluminum, Black Armor Cerakote Receiver
  8. CMMG Resolute Upper for AR-15 Platform, 16.10 in., 22 ARC, 7075-T6 Aluminum 15 in. M-LOK Handguard, Bronze
    0.0 out of 5 stars with 0 reviews
    0.0 (0)

    CMMG Resolute Upper for AR-15 Platform, 16.10 in., 22 ARC, 7075-T6 Aluminum 15 in. M-LOK Handguard, Bronze

    $949.99
  9. CMMG Resolute Upper for AR-15 Platform, 16.10 in., 22 ARC, 7075-T6 Aluminum 15 in. M-LOK Handguard, Coyote Tan
    0.0 out of 5 stars with 0 reviews
    0.0 (0)

    CMMG Resolute Upper for AR-15 Platform, 16.10 in., 22 ARC, 7075-T6 Aluminum 15 in. M-LOK Handguard, Coyote Tan
  10. CMMG Barrel Nut for CMMG Free Float Handguards, Black, Steel
    0.0 out of 5 stars with 0 reviews
    0.0 (0)

    CMMG Barrel Nut for Free Float Handguards, Black, Steel
  11. CMMG RipBrace Kit for AR-Platform, 6 Position, Fastback & P3 Technology, Black, Synthetic
    0.0 out of 5 stars with 0 reviews
    0.0 (0)

    CMMG RipBrace Kit for AR-Platform, 6 Position, Fastback & P3 Technology, Black, Synthetic

    $224.99
  12. CMMG Zeroed Lower Parts Kit for AR-Platform/Mk4, Black Grip, Ambi Safety & Mag Catch, Mil-Spec Trigger
    0.0 out of 5 stars with 0 reviews
    0.0 (0)

    CMMG Zeroed Lower Parts Kit for AR-Platform/Mk4, Black Grip, Ambi Safety & Mag Catch, Mil-Spec Trigger

    $124.99

Reviews

Review this Product

Select to rate the item with 1 star. This action will open submission form.
Select to rate the item with 2 stars. This action will open submission form.
Select to rate the item with 3 stars. This action will open submission form.
Select to rate the item with 4 stars. This action will open submission form.
Select to rate the item with 5 stars. This action will open submission form.
Be the first to review this product
Get the top deals, latest trends and more
Sign up for emails from Tractor Supply today.
First Name*
Last Name*
Email*

Customer Support

  • Order Status

  • Return Policy

  • Delivery Options

  • Tax Exemptions

  • Frequently Asked Questions

  • Contact Us

  • Recall Notices

  • Call:  

    (877) 718-6750

  • Mon - Sat: 7am - 9pm CT

  • Sun: 8am - 7pm CT

  • Closed Christmas Day

About Us

  • Who We Are

  • Investor Relations

  • Stewardship

  • Community

  • Military Support

  • Product Catalog

  • Tractor Supply Stores

  • .Pharmacy Verified Website

Work With Us

  • Careers

  • Sponsorship

  • Affiliate Program

  • Potential Vendor Partners

  • Vendor Information

  • Tractor Supply Media Network

Neighbor's Club

  • About

  • Rewards

  • Hometown Heroes

  • Frequently Asked Questions

  • Terms & Conditions

Credit Center

  • TSC Credit Card

  • Klarna

Stay Connected

Connect & Share with the Tractor Supply Community.

Tractor Supply App

Shop on the go with the Tractor Supply App

Learn More

Stay Connected

Connect & Share with the Tractor Supply Community.

Tractor Supply App

Shop on the go with the Tractor Supply App

Learn More
  • Order Status

  • Return Policy

  • Delivery Options

  • Tax Exemptions

  • Frequently Asked Questions

  • Contact Us

  • Recall Notices

  • Call:  (877) 718-6750

  • Mon - Sat: 7am - 9pm CT

  • Sun: 8am - 7pm CT

  • Closed Christmas Day

  • Who We Are

  • Investor Relations

  • Stewardship

  • Community

  • Military Support

  • Product Catalog

  • Tractor Supply Stores

  • .Pharmacy Verified Website

  • Careers

  • Sponsorship

  • Affiliate Program

  • Potential Vendor Partners

  • Vendor Information

  • Tractor Supply Media Network

  • About

  • Rewards

  • Hometown Heroes

  • Frequently Asked Questions

  • Terms & Conditions

  • TSC Credit Card

  • Klarna

Connect & Share with the Tractor Supply Community.

Shop on the go with the Tractor Supply App

Learn More
  • Privacy policy
  • Your Privacy Choices
  • Terms and Conditions
  • California Transparency Act
  • Legal Notices
  • Accessibility
  • Responsible Disclosure Statement
  • Surprise (Balance) Medical Billing Disclosure
  • Transparency in Coverage
  • Human Rights Policy
  • Vendor Code of Conduct
  • California Notice of Collection
  • Privacy Requests

© 2026, Tractor Supply Co. All Rights Reserved.