Shot Sale | Up to 30% Off! Shop Now

Magpul PMAG M3 20 Round Magazine – .300 BLK – MAG1182

SKU: MAG1182-BLK

Out of Stock
Orders will Ship within 1 Business Day
Backed by Magpul Warranty!
TOP ADD-ON'S

Highly Reliable 20-Round Magazine Designed Specifically for 300 BLK Rifles

The Magpul PMAG M3 20 Round – MAG1182 is a dedicated and highly reliable polymer magazine designed specifically for rifles chambered in .300 AAC Blackout (300 BLK). This PMAG is more compact for increased maneuverability and creates a more concealable package for use in small format firearms.

300 BLK in the past has been known for its compatibility with 5.56x45mm magazines.  However, many subsonic loads with longer projectiles can have feeding issues with traditional 5.56 magazines and this magazine solves that issue, providing shooters a true .30 caliber AR magazine that functions under the constraints of the existing AR-pattern dimensions.

Incorporates The Features & Performance of the GEN M3 Magazines

The Magpul PMAG M3 20 Round offers a safer, more reliable way to feed a 300 BLK rifle with a distinct ribbed design and smoother upper-half texture that provides the shooter a distinct visual and tactile difference from any other PMAG to mitigate dangerous cross-loading issues.

Along with its optimized 300 BLK performance, the PMAG 20 incorporates all of the GEN M3 features, including the next-generation impact and crush resistant polymer, aggressive front and rear texture, an easily removable slim floor plate, a paint pen dot matrix for marking and identification.

Features:

  • Purpose Built Magazine Only for .300 BLK
  • Designed With Visual and Tactical Differences
  • Incorporates The Same Features And Performance Of the Gen M3 Line
  • Constant-Curve Geometry
  • Long Life Stainless Steel Spring
  • Ribbed Gripping Surface
  • Aggressive Front/Rear Texture
  • Paint Pen Dot Matrix Panel on Lower Label
  • Made in the USA

Specifications:

  • Caliber: 300 BLK
  • Platform: AR15, M4, M16Caliber: .300 AAC Blackout
  • Capacity: 20 Rounds

The AT3 Tactical store has a 90 day no-hassle return policy for products in good condition. You can view the full details of our return policy here.

If you encounter an issue or defect with a product after 90 days of your purchase, you can refer to the manufacturer for a warranty claim. Their policies are below.

Magpul Warranty Information

If you ever experience an issue with a Magpul product at any time, regardless of where it was purchased, please contact us directly and we’ll do everything reasonable to help you.

To make a return, please take the following steps:

  • BEFORE returning any products, please contact us first to receive an RMA number (Return Merchandise Authorization) and prominently write it on the outside of the package. Packages will not be accepted without an RMA.
  • Include a note with your name, shipping address, phone number and email, RMA number, and reason for the return (including, if applicable, information about the firearm, ammunition, and usage environment for defective returns). Do not send ammunition.
  • Wrap the item with quality padding and place it in the original packaging or in an appropriate box for shipping.
  • A UPS shipping label will be provided in your shipment. If using the original packaging, remove or cover the original shipping label. Tape the preprinted return shipping label to the outside of the box. Drop package at an official or authorized UPS drop-off location.
  • All refunds will be applied to the credit card used for the original purchase. You should allow one to two billing cycles for the refund to appear on your statement.

Disclaimer: Manufacturer’s warranty is subject to change without prior notice.

Customer Reviews

Based on 9 reviews
100%
(9)
0%
(0)
0%
(0)
0%
(0)
0%
(0)
N
Norman` Thompson
300 blackout 7.62 x 35 magazine

Also bought a WARHAMMER Charging Handle and a BCG from AT3 tactical and all of it works like a charm. I've had parts from other popular websites before, and they're great like palmetta armory but AT3 did not disappoint!! looking for a buffer next!!

R
Rick wheat
Magpul magazines

Just as good as the rest of Magpul magazines

T
T
Great

No problems. My rifle likes them.

Thank you for the positive feedback! We are glad to hear that our product is working well for you and your rifle. Happy shooting!

M
Marvin
Magpul magazines are always my gold standard

I have three 300BLK units all setup for different purposes. Two of these have PSA branded lower receivers and one has a Black Rain lower receiver. Using Magpul 556 magazines and cartridges with 300BLK 110 gr. V-MAX and 110 gr. TAC-TX bullets, all mags insert into all receivers and work okay, with the Black Rain receiver having more resistance than the PSA.

However, my cartridges using the Maker 200 gr. bullets noticeably drag inside the magazine well of the PSAs but still work, while the Black Rain magazine well is apparently smaller inside and makes the Magpul 556 magazines unusable with this bullet profile.

These Magpul 300BLK specific mags all work well with all bullet types in both receiver brands.

Thanks for sharing your feedback! We're glad you're satisfied with your purchase.

D
Don G
Perfect 300 Blk mag

Flawless, feeding locks up and drops free just what you need in a magazine

Thanks for sharing your feedback! We're glad you're satisfied with your purchase.

Customers who viewed this item also viewed these products

Magpul PMAG M3 30 Round Magazine 300BLK - MAG800-BLK

$15.15
Purpose-Designed Magazine For Rifles Chambered In 300 Blackout The Magpul PMAG M3 300BLK is
Magpul PMAG M3 10 Round Magazine .223 / 5.56 NATO Black - MAG559-BLK

Magpul PMAG M3 10 Round AR 15 Magazine .223 /...

$14.20
Next Generation PMag With Wide Compatibility On Non-AR Platforms This Magpul PMAG M3 is
Magpul PMAG M3 20 Round Magazine .223 / 5.56 NATO Black - MAG560-BLK

3-Pack - Magpul PMAG M3 20 Round AR 15 Magazine...

$42.99
Buy In Bulk And Save! This Pack Includes Three (3) M3 20-Round Pmags The
Magpul PMAG M3 10/30 Round – .223/5.56 – MAG1183 - AT3 Tactical

Magpul PMAG M3 10/30 Round Magazine – .223/5.56 – MAG1183...

$17.05
Full Body 10-Round Magazine To Utilize Training & Gear Compatibility For Restricted Areas The
Magpul Magazine Maglink Coupler - Black PMAG and M3 Magazines MAG595-BLK

Magpul Magazine Maglink Coupler - Black PMAG and M3 Magazines...

$17.99
Allows Easy Access On Extra 30-Rounds Of Ammo With No Hassle The MagLink is
Magpul PMAG M3 30 Round - .223 / 5.56 NATO - MAG557

Magpul AR-15 PMAG M3 30 Round Magazine - .223 /...

$14.20
Next Generation 30-Round Magazine Enhanced For Strength And Reliability The Magpul PMAG M3 is
Magpul PMAG M3 30 Round Window - .223 / 5.56 NATO - MAG556

Magpul PMAG M3 30 Round Magazine w/Window - .223 /...

$17.49
The All-in-One 30-Round Magazine For Absolute Performance The Magpul PMAG M3 Window is a
Magpul PMAG M3 20 Round Magazine .223 / 5.56 NATO Black - MAG560-BLK

Magpul PMAG M3 20 Round AR 15 Magazine .223 /...

$14.20
100% Tough, Durable and Reliable – Great Addition to Your Build The Magpul PMAG
Magpul PMAG 5 Rd Limiter 3 pack - 762NATO - Fits PMAG Gen M3 - MAG562BLK

Magpul PMAG 5 Rd Limiter 3 pack - 762NATO -...

$12.99
Easy To Install PMAG 5-Round Limiter Great For Hunting Applications The Magpul PMAG 5
Magpul PMAG M3 20 Round Magazine .223 / 5.56 NATO Black - MAG560-BLK

6-Pack - Magpul PMAG M3 20 Round AR 15 Magazine...

$84.99
Buy In Bulk And Save! This Pack Includes Six (6) M3 20-Round Pmags The
Magpul PMAG M3 10 Round Magazine .223 / 5.56 NATO Black - MAG559-BLK

3-Pack - Magpul PMAG M3 10 Round AR 15 Magazine...

$42.99
Buy in Bulk And Save! This Pack Includes Three (3) M3 10-Round Pmags This
Magpul PMAG M3 10 Round Magazine .223 / 5.56 NATO Black - MAG559-BLK

6-Pack - Magpul PMAG M3 10 Round AR 15 Magazine...

$84.99
Buy in Bulk And Save! This Pack Includes Six (6) M3 10-Round Pmags This
Magpul PMAG 30 Round M2 MOE Window Mag - .223 / 5.56 NATO - MAG570

Magpul PMAG 30 Round M2 MOE Window AR 15 Magazine...

$15.99
A Cost-Effective But Very Durable Upgrade From Aluminum USGI Magazines The PMAG 30 Round
40 Round PMAG: Magpul M3 .223 / 5.56 NATO – MAG233

40 Round AR 15 PMAG: Magpul M3 Magazine .223 /...

$22.99$20.69
A Tough and Reliable 40-Round Magazine for Long-term Use! The 40 Round PMAG Magpul
Magpul PMAG 20 LR/SR Gen M3 Window Magazine - .308/7.62

Magpul PMAG 20 LR/SR Gen M3 Window Magazine - .308/7.62

(no reviews yet)
$23.70
Reliable Performance with Clear Ammo Visibility The Magpul PMAG 20 LR/SR Gen M3 Window

Frequently purchased together

Magpul PMAG M3 30 Round Magazine 300BLK - MAG800-BLK

$15.15
Purpose-Designed Magazine For Rifles Chambered In 300 Blackout The Magpul PMAG M3 300BLK is
UTG Gen 2 Light/Red Laser Combo with Integral Mounting Deck

UTG Gen 2 Light/Red Laser Combo with Integral Mounting Deck

An Excellent Tactical Light And Laser From UTG UTG Gen 2 Light/Red Laser Combo

Hera H1 Gen 2 10 Round AR-15 Magazine

$8.90
Hera USA H1 Gen 2 10 Round AR15 Magazine Made in Germany with high-impact
AT3™ AR-15 A2 Mil-Spec Flash Hider with Crush Washer

AT3™ .300 BLK/.308 WIN Birdcage Flash Hider with Crush Washer

$11.99$10.19
Classic Birdcage Flash Hider, Sized up for .30 Caliber Limits muzzle flash for effective
Magpul M3 10 Rd Magazine - MAG290

Magpul M3 10 Rd Magazine - 308 Win/7.62NATO Caliber -...

$21.80
A Reliable and Cost-Effective 10 Round Magazine Of Next Generation The Magpul M3 10

Strike Industries Bikini M-LOK Handstop - 2 Pack

(no reviews yet)
$11.95
The Bikini Hand Stop: Lightweight, Low-Profile Control for Your M-LOK Rails Elevate your shooting
Magpul Aluminum Picatinny Rail Section for M-LOK - 4 Lengths - 3, 5, 7, or 9 Slot

Magpul Aluminum Picatinny Rail Section for M-LOK - 4 Lengths...

$16.49
Aluminum Rail Sections For M-LOK Compatible Handguards And Forends The Magpul Aluminum Rail Section
SB Tactical SBA4 AR15 Pistol Brace

SB Tactical SBA4 Pistol Brace with Mil-Spec Buffer Tube -...

$114.99
SB Tactical’s Latest and Greatest – A Fully-Adjustable Successor to the SBM4 The SBA4

Aero Precision BREACH Charging Handle for AR-15

$84.99
Rugged Gas Busting Ambidextrous Charging Handle Aero Precision brings cutting-edge craftmanship and a fit
Pack of 10 T-Nuts and Screws with Allen Wrench

AT3 Replacement M-LOK T-Nuts and Screws - 10 Pack for...

$4.99$4.24
Replacement M-LOK T-Nuts to Repair Your Favorite Accessories Whether you’re running an M-LOK picatinny

Samson Manufacturing Corp M-LOK Vertical Grip - Multiple Sizes and...

$53.82
Get a Rock-Solid Grip with Samson M-LOK Vertical Grips Samson’s vertical foregrips provide enhanced
Magpul MS3 Multi Mission Sling - Gen 2 - MAG514

Magpul MS3 Multi Mission Sling - Gen 2 - MAG514

$47.45
Weapon-Retention Solution For Tactical Environments And Missions The Magpul MS3 Multi-Mission Sling was designed
UTG AR15 Receiver Wedge

UTG AR15 Receiver Wedge

$1.97
UTG AR15 Upper and Lower Receiver Wedge Eliminate rattle between your AR15 receivers with
Magpul PMAG M3 10 Round Magazine .223 / 5.56 NATO Black - MAG559-BLK

Magpul PMAG M3 10 Round AR 15 Magazine .223 /...

$14.20
Next Generation PMag With Wide Compatibility On Non-AR Platforms This Magpul PMAG M3 is
UTG Ultra Slim M-LOK Angled Foregrip

UTG Ultra Slim M-LOK Angled Foregrip

$22.97
Lightweight & Durable Foregrip For Excellent Weapon Control This UTG Ultra Slim M-LOK Angled

Questions & Answers

Don't see the answer
you're looking for?

Loading questions...