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.

Shopping Cart
Questions & Answers
Is the gas block pinned or set with set screws? Thanks in advance. Expert Answer

The manufacturer doesn't state if the CMMG, Inc RESOLUTE 300 Series Upper Receiver Group gas block is pinned or uses set screws. I recommend contacting CMMG in regards to that information.

by Hunter, Gear Expert, April 29, 2022
Will this fit a Ruger AR-556 MPR Expert Answer

Yes. The CMMG, Inc RESOLUTE 300 Series Upper Receiver Group will fit any Mil-Spec AR15 lower receiver.

by Ethan, Gear Expert, January 26, 2022

Product Discontinued by Manufacturer

CMMG, Inc RESOLUTE 300 Series Upper Receiver Group has been discontinued by CMMG and is no longer available. Our product experts have helped us select these available replacements below.You can also explore other items in the Gun Parts, AR 15 Parts, Rifle Parts, AR15 Upper Receivers yourself to try and find the perfect replacement for you!

Product Info for CMMG, Inc RESOLUTE 300 Series Upper Receiver Group

For those who refuse to compromise on quality, the CMMG, Inc RESOLUTE 300 Series Upper Receiver Group is an excellent way to make sure you have a stable and accurate mounting point. Produced with incredibly long lasting and reliable materials, the CMMG, Inc RESOLUTE 300 Series Upper Receiver Group will provide you with years of reliability. For a great way to make sure you are shooting with one of the best, most long lasting upper receiver groups the shooting industry has to offer, choose the CMMG, Inc RESOLUTE 300 Series Upper Receiver Group.image

Package Contents:

  • CMMG, Inc RESOLUTE 300 Series Upper Receiver Group

Ammunition

1–60 / 60
Previous
Next

Magazine and Accessories

1–47 / 47
Previous
Next

Firearm Case

1–40 / 40
Previous
Next

Gun Triggers

1–26 / 26
Previous
Next

Gunsmithing Tools & Accessories

1–29 / 29
Previous
Next

Ammo Boxes

1–34 / 34
Previous
Next

Gun Stocks

1–33 / 33
Previous
Next

Gun Parts and Accessories

1–57 / 57
Previous
Next

Gun Sights

1–29 / 29
Previous
Next

Gun Barrels

1–25 / 25
Previous
Next

Forends/Handguards

1–15 / 15
Previous
Next

Mounts, Rings and Accessories

1–33 / 33
Previous
Next

Gun Cleaning Kits

1–17 / 17
Previous
Next

CMMG Accessories

1–12 / 12
Previous
Next

Related Products to CMMG, Inc RESOLUTE 300 Series Upper Receiver Group

CMMG, Inc RESOLUTE 300 Series Upper Receiver Group Unavailable & Discontinued Models

List of Unorderable Models

CMMG, Inc Upper Receiver Group, RESOLUTE 300, MK4, 22LR, 25.3 inch, 17 inch Barrel, RML15 M-LOK Handguard, 1/2-28, SV Brake, Black, 22B83A6 , MPN: 22B83A6 , UPC: 816422026722 , Code: 2CM-URC-RESOLUTE300-22B83A6
CMMG, Inc Upper Receiver Group, RESOLUTE 300, MK4, .300 BLK, 25.3 inch, 16.1 inch Barrel, RML15 M-LOK Handguard, 5/8-24, SV Brake, Black, 30B12C8 , MPN: 30B12C8 , UPC: 816422026739 , Code: 2CM-URC-RESOLUTE300-30B12C8
CMMG, Inc Upper Receiver Group, RESOLUTE 300, MK9, 9mm Colt, 25.3 inch, 16.6 inch Barrel, RML15 M-LOK Handguard, 1/2-36, SV Brake, Black, 90B1A74 , MPN: 90B1A74 , UPC: 816422026760 , Code: 2CM-URC-RESOLUTE300-90B1A74
CMMG, Inc Upper Receiver Group, RESOLUTE 300, MK4, 5.56x45mm, 25.3 inch, 16.1 inch Barrel, RML15 M-LOK Handguard, 1/2-28, SV Brake, Black, 55BC791 , MPN: 55BC791 , UPC: 816422026746 , Code: 2CM-URC-RESOLUTE300-55BC791
CMMG, Inc Upper Receiver Group, RESOLUTE 300, MKGs, 9mm Glock, 26.85 inch, 16.1 inch Barrel, RML15 M-LOK Handguard, 1/2-28, SV Brake, Black, 99BE6BD , MPN: 99BE6BD , UPC: 816422026784 , Code: 2CM-URC-RESOLUTE300-99BE6BD
CMMG, Inc Upper Receiver Group, RESOLUTE 300, MKG, .45 ACP Glock, 25.3 inch, 16.1 inch Barrel, RML15 M-LOK Handguard, .578-28, SV Brake, Black, 45BE523 , MPN: 45BE523 , UPC: 816422026777 , Code: 2CM-URC-RESOLUTE300-45BE523
CMMG, Inc Upper Receiver Group, RESOLUTE 300, MK47, 7.62x39mm, 25.7 inch, 16.1 inch Barrel, RML15 M-LOK Handguard, 5/8-24, SV Brake, Black, 76BFC9C , MPN: 76BFC9C , UPC: 816422026753 , Code: 2CM-URC-RESOLUTE300-76BFC9C
CMMG, Inc Upper Receiver Group, RESOLUTE 300, MK3, .308 WIN, 16 inch Barrel, RML15 M-LOK Handguard, 5/8-24, SV Brake, Black, 38BEACF , MPN: 38BEACF , UPC: 816422026715 , Code: 2CM-URC-RESOLUTE300-38BEACF
CMMG, Inc Upper Receiver Group, RESOLUTE 300, MKW-15, 6.5 Grendel, 25.7 inch, 16.1 inch Barrel, RML15 M-LOK Handguard, 5/8-24, SV Brake, Black, 66BA1FD , MPN: 66BA1FD , UPC: 816422026807 , Code: 2CM-URC-RESOLUTE300-66BA1FD
CMMG, Inc Upper Receiver Group, RESOLUTE 300, MKW-15, .458 SOCOM, 25.7 inch, 16.1 inch Barrel, RML15 M-LOK Handguard, 5/8-32, SV Brake, Black, 48B7A5E , MPN: 48B7A5E , UPC: 816422026791 , Code: 2CM-URC-RESOLUTE300-48B7A5E
Compare (0)