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

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Reliable Performance with Clear Ammo Visibility

The Magpul PMAG 20 LR/SR Gen M3 Window Magazine is a durable, high-performance polymer magazine designed for use with .308, 7.62×51, or 6.5 Creedmoor. Made to fit the SR25 and other AR-10 style platforms, this magazine combines rugged construction with innovative features with the M3 generation. Upgrade your rifle’s capabilities with the Magpul PMAG 20 LR/SR Gen M3 Window Magazine, trusted by professionals worldwide.

Anti-glare Translucent MagLevel Windows

The transparent window on the side of the magazine provides a quick and clear view of the remaining ammunition, allowing for better situational awareness during shooting sessions. The magazine also features a removable dust cover to protect the feed lips and ammunition from dirt, debris, and damage during storage or transport.

The Magpul M3 20 Rd Magazine also has a flared floorplate yet is slim enough for use with tight double and triple magazine pouches. The high-quality stainless steel spring inside is corrosion-resistant, and the integrated follower is self-lubricating with an anti-tilt feature for increased reliability.

Features

  • Optimized for use with SAAMI-spec 7.62×51/.308 Winchester ammunition
  • Additional commercial rifle compatibility includes the new Armalite AR-10A, Bushmaster .308 ORC, Colt LE901-16S, CORE Rifle Systems CORE30, DPMS LR308, JP Enterprises LRP-07, KAC SR25, LaRue OBR, Les Baer .308, LMT .308 MWS, LWRCI REPR, Mega Arms MATEN, POF P-308, Remington R-25, Ruger SR-762, S&W M&P10, SIG716, and others*
  • Next-generation impact and crush-resistant polymer construction
  • Windowed to view how many rounds are in the magazine
  • Constant-curve internal geometry for smooth feeding
  • Anti-tilt, self-lubricating follower for increased reliability
  • High-quality stainless steel spring for corrosion resistance
  • Ribbed gripping surface and new aggressive front and rear texture for positive magazine handling
  • Paint pen dot matrix panels on the bottom of the body to allow for identification marking
  • Flared floorplate aids magazine handling and disassembly yet is slim enough for use with many pouches
  • Available in Black or Coyote Tan
  • Made in the USA

NOTES

  • Compatible with older model Bushmaster .308 ORC, Remington R-25, and DPMS LR308 rifles, but not optimized for bolt lock functionality with newer models based on the DPMS GII design.
  • NOT compatible with Armalite AR-10B, Springfield Armory M1A, Rock River Arms LAR8, FN SCAR 17S, PTR-91, HK417 or any other rifles that utilize M14, FN FAL, or HK 91/G3 patterned magazines.
  • To accommodate longer than SAAMI-spec match ammunition, this magazine may not drop free from all makes of lower receivers.

Specifications

  • Brand: Magpul Industries
  • Model: PMAG 20 LR/SR Gen M3 Window Magazine
  • Fit: AR-10, LR308, and SR-25 Rifles
  • Class: AR-10/.308 Magazines
  • Caliber: .308WIN, 7.62×51, and 6.5 Creedmoor
  • Capacity: 20 Rounds
  • Material: Polymer
  • Color: Black and Flat Dark Earth

Products available on this page:

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.

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