Skip to main content

CMMG Mk4 Upper Receiver Group 6.5 Grendel CMM64BCF88MB

CMMG
CMMG Upper
CMMG Mk4 Upper
CMMG Mk4 Upper Receiver Group

CMMG Mk4 Upper Receiver Group 6.5 Grendel CMM64BCF88MB

Add UPC Alert

CMMG Mk4 Upper Receiver Group 6.5 Grendel CMM64BCF88MB

CMMG
CMMG Upper
CMMG Mk4 Upper
CMMG Mk4 Upper Receiver Group

UPC
810097504769: MPN
CMM64BCF88MB: Brand
CMMG: Main Model
CMMG Mk4 Upper: Model
Mk4 Upper Receiver Group: Caliber
6.5 Grendel: Type
Upper: Barrel Length
16"

Store	Price	Shipping rate	Report	Show more
Optics Planet	$779.99	FREE Shipping on most orders over $49, $9.99 Flat rate shipping on Ammo

No matching products found.

CMMG Mk4 Upper Receiver Group 6.5 Grendel CMM64BCF88MB

Thinking about selling your CMMG Mk4 Upper Receiver Group 6.5 Grendel CMM64BCF88MB?

Compare offers from our partners and start the process online in minutes.

Guns.com

Get an Offer →

Customer reviews

Leave a review

This product hasn't received any reviews yet. Be the first one to rate, describe your experience or upload photos

Recent coupons (10)

No Code Needed

Expiration date 2026-Jul-26 Store Brownells Report

10%

liberty26

Expiration date 2026-Jul-31 Store Moriarti Armaments Report

17% Off (Max. Discount $50, Excl. Apply)

17OFFJULY

Expiration date Unknown Store AR15Discounts Report

12% OFF + 2% Bucks (Excl. May Apply)

DSCNT

Expiration date Unknown Store Optics Planet Report

14% Off Rifle Scopes, Rangefinders & Spotting Scopes (Some Excl. Apply)

SAVEBIG

Expiration date 2026-Jul-15 Store Optics Planet Report

12% OFF Sitewide (Excl. Apply)

JULY1226

Expiration date Unknown Store AR15Discounts Report

10% Off Exigent Defense Suppressors

EXIGENT10

Expiration date Unknown Store BattleHawk Armory Report

Free Shipping on Guns & Orders $99+ for USAGO Members

Cool

Expiration date Unknown Store USAGO Report

15% Off Almost Everything

USA1-5250-8X9Z

Expiration date Unknown Store Brownells Report

10% off LMT DEFENSE FIREARMS

LMT

Expiration date 2026-Jul-14 Store BattleHawk Armory Report

Add a Coupon

Recent comments

AR-47 7.62x39 5" Moriarti Micro Mini Series Semi-Auto Pistol Color Option - Blue, FDE, ODG, Grey - $549.95

They also have the.223/556 version with custom colors for $529 at the link below

https://moriartiarmaments.com/ar-15-moriarti-5-micro-pistol-centurion-mag-choose-color-and-caliber.html...

4 min 17 sec ago ByRunninNgunnin1
PSA Dagger Compact 9mm Pistol With SW1 RMR Slide & TiN Spiral Fluted Threaded Barrel, Black - $359.99

It all comes down to preference as well as intended use. Obviously the compact version is better suited for concealed carry while the full size models are easier shooting and in manipulation of the gun. I wouldn't say any of them are "better". Good luck

16 min 56 sec ago ByRunninNgunnin1
Orthos Arms Joker Elite, 12 Gauge, 13.00" Barrel, 10 Rds, Woodland Camo Elite Cerakote - $1499.99 (Add to Cart Price)

Hands down the sexiest AR style Semi auto 12 gauge shotgun on the market today. It just exudes badassness. Haha if that's even a word...
Seriously though this is a top of line shotgun and if the price keeps dropping, I am in for one at $1000-$1100
The only question I have is how they got to the 10 round capacity while all others are capped at 5 rounds unless using a ridiculous looking extra long 10 round mags

27 min 6 sec ago ByRunninNgunnin1
Archon Type B Gen 2 4.3" 9mm (1)18rd/(1)15rd/(1)12rd Pistol - $599.99

This pistol is screaming to be optics ready and having a threaded barrel. If it had those 2 additions, I would be in for one. It's sort of a shame for full sized, duty type pistols not to have at least an optics cut....I do like the gun and the price seems reasonable.

45 min 15 sec ago ByRunninNgunnin1
SIG P320 9mm 3.9 Pro BLK 17 Rd OR Off Duty - $572.96 (+ FREE Foxtrot-EDC Flashlight after Rebate)

The W products are not eligible for the flashlight rebate. Don't believe Sig's lies.

1 hour 1 min ago ByBeansBeans
BOE Suppression IncoLite 9S 9mm Inconel Suppressor - Black - BOE-IL9S - $399

Me too. June 26

45 min 45 sec ago ByUndivided
OSIGHT K Micro Red Dot Sight, Green 6 MOA Open Reflex Sight with RMSc/K Footprint, Parallax-Free Durable Optic for Subcompact Setups - $144.49

best red dot i own. And I think I own most of the holosun lineup.

8 hours 6 min ago Bypyratio
Chiappa M1-9 9mm 19" 10rd Semi-Auto Rifle w/ Faux Suppressor Black - $615.45

Well, that's gay. Trying to repackage a slow seller. How about instead, putting a nice wood stock on it and making it look like a WW2 carbine, but in 9mm? Nah, let's go gay...

8 hours 31 min ago ByWesternStar
BOE Suppression IncoLite 9S 9mm Inconel Suppressor - Black - BOE-IL9S - $399

Is it an ATF thing or they just haven't shipped?

11 hours 53 min ago ByELaw31
Osight K 6 MOA Dot Open Red Dot Sight RMSc Footprint, Black - $101.89 (Email Price)

You might try calling the phone number shown on this page: https://www.ffls.com/ffl/337029019d06855/gun-wise-llc...
At some point, that phone # must have been tied to the website this gun.deals listing directs to. Google the phone number (exactly as shown on that page) and take a look at the search results. Good luck.

13 hours 13 min ago ByPanheadDude