Skip to main content

CMMG Mk3 AR-10 Rifle 300 Win Mag 38AD20C-SB

CMMG
CMMG Mk3 AR-10 Rifle

CMMG Mk3 AR-10 Rifle 300 Win Mag 38AD20C-SB

Add UPC Alert

CMMG Mk3 AR-10 Rifle 300 Win Mag 38AD20C-SB

CMMG
CMMG Mk3 AR-10 Rifle

UPC
810148629649: MPN
38AD20C-SB: Brand
CMMG: Model
Mk3: Caliber
300 Win Mag: Capacity
10+1 Rd.: Features
M-LOK Handguard, Picatinny Rail, Threaded Barrel, Magpul PMAG Magazine, Mil-spec Trigger, Zeroed Pistol Grip: Type
AR-10 Rifle: Action
Semi-Automatic: Finish
Smoked Bronze: Stock
M4-style Buttstock, Adjustable: Sight
None, Optic-Ready: Receiver
Forged 7075 T6 Aluminum: Muzzle
5/8"x24 TPI, Zeroed A2 Flash Hider: Barrel Length
16.1": Weight
9 lb.

No matching products found.

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)

Free Shipping on Magpul Products

MAGPULFS

Expiration date Unknown Store Brownells Report

13% Off +2% Bucks (excl. apply)

DADDAY

Expiration date 2026-Jun-15 Store Optics Planet Report

Up to 14% OFF Rifle Scopes, Red Dots & Night Vision

SPOTME

Expiration date Unknown Store Optics Planet Report

ARKPROOG

Expiration date Unknown Store BuyAGun.net Report

$150+ Orders Ship Free (Excl. Firearms, Ammo, Reloading, Mag. Packs & Flash Sales)

150FREESHIP

Expiration date Unknown Store Brownells Report

12% OFF Sitewide (Excl. Apply)

JUNE1226

Expiration date Unknown Store AR15Discounts Report

10% Off Exigent Defense

EXIGENT10

Expiration date Unknown Store BattleHawk Armory Report

5% Off PSA Sabre Firearms

scotsman2sabre5

Expiration date 2027-May-25 Store Palmetto State Armory Report

5% Off of PSA's Sabre Line of Products

BEYOND9SABRE5

Expiration date Unknown Store Palmetto State Armory Report

PMC5OFF

Expiration date Unknown Store Ammunition Depot Report

Add a Coupon

Active rebates (10)

Foxtrot Consumer Promotion

Brand Sig Sauer Expiration date 2026-Aug-31

Savage Arms Father's Day Axis $75 Rebate

Brand Savage Arms Expiration date 2026-Jun-30

Silent Summer Rebate

Brand IWI Expiration date 2026-Nov-01

Norma NXD and Safeguard Ammo Rebate

Brand Norma Expiration date 2026-Jul-01

Winchester Summer Firearms Rebate

Brand Winchester Expiration date 2026-Jun-21

Beretta Shotgun Rebate

Brand Beretta Expiration date 2026-Aug-01

Back In Your Holster Revolver Rebate

Brand Colt Expiration date 2026-Jul-01

Gear Up - Free XDM Elite 10mm

Brand Springfield Expiration date 2026-Sep-01

Kimber 2K11 Summer Centennial

Brand Kimber Expiration date 2026-Jul-05

Stoeger STR Rebate

Brand Stoeger Expiration date 2026-Jul-01

Recent comments

ATI GSG-16 16.25" .22 LR 22-Rd Carbine Rifle, Black w/ DUO Red / Green Sight - $349.99

This is a fun plinker, but needs HV ammo (1280 fps works great for me) to cycle right. Warning, it's an absolute nightmare to clean without totally breaking it down and that in and of itself is a royal PITA.

2 hours 45 min ago ByAttackDonut
45% off CVLIFE 42" Soft Rifle Case Rifle Bag Double Long Gun Bag, Gun Case Rifle Backpack, with Lockable Zipper and Backpack Strap for Outdoor Hunting Shooting w/code 8TDTXPZ9

Code worked. Awesome deal

5 hours 16 min ago ByMushyPurples
Otter Creek Polonium 30 - $439.99 (Add to Cart for Best Price)

$439 is a great price. Of the poloniums the 30 is the least gassy on a 15. Still pretty gassy. I own all variants of the poloniums. They are very tough cans. Mostly they get used on bolt actions now. Baffle cans are bolt cans. I actually am the exact opposite of most. I like titanium on semi autos and steel on bolt guns. Sure titanium only can take 60 shots before cool. I let my barrels cool after 15. I like the light weight on a 15. On bolts I like steel doesn't get hot as fast. Less mirage.
If you want a can for a 15 do yourself a favor and pony up for a CAT or a,vent or a tisha. Low back pressure printed cans. Printed vs baffle.Your eyes and lungs will thank you. Baffle cans are bolt cans.. Printed are 15 cans. Sure you can screw that baffle can on your 15. Play with gas and buffers so it works. Your eyes and lungs will let you know after a while they are not happy. The polo and the enticer are awesome budget baffle cans. The titanium enticer or wolf hunter is a great do all can. Light enough for hunting. Not 15 cans.
The polo cans were a legacy. Great company. We have come a long way baby.

5 hours 14 min ago ByUndivided
45% off CVLIFE 42" Soft Rifle Case Rifle Bag Double Long Gun Bag, Gun Case Rifle Backpack, with Lockable Zipper and Backpack Strap for Outdoor Hunting Shooting w/code 8TDTXPZ9

Code doesn’t work

6 hours 45 min ago ByCOLBUD
Kershaw Appa Folding Tactical Pocket Knife, SpeedSafe Opening, 2.75" Black Blade and Handle Small - $16.44

My EDC for box opening at work, a modern replacement for the Old Timer style. Recently gave away mine to a customer and bought another. Featherweight but durable grips, compact, flips nicely.

9 hours 25 min ago ByEarlie
CobraTec Praxis Slim OTF Knife Dagger Not Serrated - $59.99

Picked up the standard blade. Not bad for $50 bucks. Finish is mediocre, mine has mill marks and burrs. Action is nice, blade is decent.

20 hours 20 min ago ByCarbine
EOTech EXPS2 Red Dot Sight, Picatinny Black - $489.99 (Add to Cart for Best Price) + FREE Shipping

I've purchased four Eotechs from SF and had to return three because they ship used/scratched units as "new"

21 hours 30 min ago Byobamatrump
24" Compact Gun Shelf, Gun Rack with Automatic Induction Lock with Secure Hidden Compartment for Wall Mount Display, Storage Security Safe Box for Home, Wood - $89.99

You could even hide your weed in it.

23 hours 38 min ago Byjuicyj
Ballistic Advantage 5.5" 9mm Barrel, Modern Series - $26.25 + FREE Shipping

Decent feed cone profile but not the new one. That's why.

1 day 1 hour ago ByUndivided
American Tactical Alpha Maxx, 5.56X45MM, 7.50" Barrel, 60 Rds, Black - $319.99

Ahh the PLASTIC FANTASTIC shows up again
More plastic in this gun than your grandma had in her cupboards after a 1980's Tupperware party! Lol in all seriousness I would not ever buy one of these. Especially when there are so many companies pumping out budget friendly AR's for just a few bucks more. Everything about this gun is plastic including the trigger, hammer, upper and lower receivers, front rail, and so on...if you want a safe queen to sit and look at them this would probably fit that bill. But if you're someone who goes out and shoots often, out practicing drills, firing at high rates, runs a suppressor and want a gun that will last, id suggest looking elsewhere but if you are doing all the things I mentioned, you probably already know this.
This is solely my opinion and my experiences and if you want this gun or have a different opinion, that's just fine, that is your right. Just like it is my right to have my opinion. Good day!

1 day 4 hours ago ByLivinitup1976