+1-800-504-5897 Live Chat Help Center Check Order Status
About Us Policies Reviews How To
Free Shipping & Free Returns*

FREE SHIPPING on Over 250,000 Products

Shop now and get Free Value Shipping on most orders over $49 to the contiguous 48 states, DC, and to all U.S. Military APO/FPO/DPO addresses.

Enjoy our FREE RETURNS

We want to ensure that making a return is as easy and hassle-free as possible! If for any reason you are not satisfied with your purchase, simply return the item within 30 days of receipt, and we'll cover the cost of return shipping. Learn more about our Return Policy.

  • Entire Store
  • ...
  • Apparel & Footwear
  • Astronomy
  • Everything Else
  • Eyewear
  • Hunting Gear
  • Lab Equipment
  • Military Gear
  • Outdoor Gear
  • Photography Equipment
  • Police, EMS & Fire
  • Shooting
  • Sport Optics
  • Sports & Hobbies
TIP
Shopping Cart

CMMG 9mm 5in Barrel Barrel and BCG Kit 99D17C3 Color: Black, Finish: Matte, Fabric/Material: 4140CM, $35.46 Off w/ Free S&H

Cmmg, Inc Cmmg Barrel W/bolt Kit 9mm 5'' Rdb Black
Cmmg, Inc Cmmg Barrel W/bolt Kit 9mm 5'' Rdb Black
1 of 1 images
Cmmg, Inc Cmmg Barrel W/bolt Kit 9mm 5'' Rdb Black

Tap Tap to Zoom

Government Export Restriction Government Export Restriction
Government Restriction Government Restriction
Questions & Answers
is the barrel proprietary to the bcg or can you use any other manufactures 9mm barrel?

No, you cant'. The CMMG barrel has lugs that lock into the bolt. That's how it works.

by Klugey1, Verified Owner, December 20, 2024
See 1 More Answer
Would this be compatible with a cmmg dissent?

No. The Dissent uses a different proprietary BGC

by Vic, Verified Owner, December 3, 2025
View All Q&A You Have a Question? Ask!
Customer Reviews
Helpful Positive Review
so far, so good by Steve, Verified Owner, December 18, 2023
Took my fresh 9mm pistol build out this weekend to test function. I upgraded from a blowback operated system to the CMMG system in hopes of a lighter, less jumpy and controllable gun for my wife. Unsure of what to use for a spring and buffer, I tri...
Read More...
2/2 found this helpful
Most Recent Reviews
Great SBR or PCC kit by Mario, Verified Owner, May 22, 2024
Bought this to make a companion upper for my Banshee .45 upper to go with my SBR lower. These are optimized for use with Glock magazines, but they utilize a lower sitting magazine compared to other AR9s. I'm using modified Colt SMG pattern magazines,...
Read More...
Read All 2 Reviews
Color: Black Finish: Matte Caliber: 9mm Luger Barrel Length: 5 inBarrel Profile: Medium Taper Threads per Inch: 1/2x28 Barrel Twist Rate: 1-10 Flutes: No Gun Make: AR Platform Gun Model: AR-15 Weight: 1.4 lbCondition: New

Code: 2CM-ATB-99D17C3-99D17C3

MPN: 99D17C3

UPC: 815835019796

List: $449.95Save $35.46
$414.49

Product Info for CMMG 9mm 5in Barrel Barrel and BCG Kit

Improve your weapon's form and function by installing the CMMG, Inc. 9mm 5in Barrel W/ Bolt Kit. CMMG crafted these AR15 Barrels from 4140 Chrome Moly with a salt bath nitride finish inside and out for a durable part that is highly-resistant to corrosion and abrasion. This CMMG, Inc. 9mm 5in 9x19 Barrel W/ Bolt Kit features a Radial Delayed Blowback Bolt that creates a lightweight system with improved felt recoil reduction with every shot. Build a better weapon with all the components of the CMMG, Inc. 9mm 5in 1/2x28 Barrel and BCG Kit.image

WARNING: California`s Proposition 65

Specifications for CMMG 9mm 5in Barrel Barrel and BCG Kit:

Manufacturer: CMMG
Color: Black
Finish: Matte
Fabric/Material: 4140CM
Caliber: 9mm Luger
Barrel Length: 5 in
Barrel Profile: Medium Taper
Threads per Inch: 1/2x28
Barrel Twist Rate: 1-10
Flutes: No
Gun Make: AR Platform
Gun Model: AR-15
Weight: 1.4 lb
Condition: New
Dimensions: 1.90 X 1.95 X 14.80 in

Features of CMMG, Inc. 9mm 5in Barrel W/ Bolt Kit:

  • 5in Medium Taper
  • 1:10 Twist
  • 4140 Chrome Moly
  • Salt Bath Nitride Finish inside and out
  • 9×19 NATO Chamber
  • Threaded 1/2-28
  • Radial Delayed Blowback Bolt (Patent Pending)
  • Requires enlarged ejection port for reliable operation.

Package Contents:

  • CMMG 9mm 5in Barrel Barrel and BCG Kit

What firearm models does the manufacturer say CMMG 9mm 5in Barrel Barrel and BCG Kit is compatible with?

The manufacturer says that CMMG 9mm 5in Barrel Barrel and BCG Kit is compatible with AR-15

CMMG 9mm 5in Barrel Barrel and BCG Kit Orderable Models

List of Orderable Models

  • CMMG 9mm Barrel and BCG Kit, 5in 4140CM, SBN, Black, 99D17C3 , MPN: 99D17C3 , UPC: 815835019796 , Code: 2CM-ATB-99D17C3-99D17C3

CMMG 9mm 5in Barrel Barrel and BCG Kit Unavailable & Discontinued Models

List of Unorderable Models

  • USED CMMG 9mm Barrel and BCG Kit, 5in 4140CM, SBN, Black, 99D17C3, EDEMO3, Condition Fair, Other , MPN: 99D17C3-EDEMO3 , Code: 2CM-ATB-99D17C3-99D17C3-EDEMO-OT-D
  • DEMO, CMMG 9mm Barrel and BCG Kit, 5in 4140CM, SBN, Black, 99D17C3 , MPN: 99D17C3-DEMO , Code: 2CM-ATB-99D17C3-99D17C3-DEMO
Compare (0)
1 item has been added
Add at least two items to compare