Need more rounds on tap for 3-Gun or multi-gun competition in Australia? The .308 +5 magazine extension base pad adds 5 rounds to your Magpul PMAG Gen III magazines — CNC-machined from anodised aluminium with knurled grip for fast reloads in any conditions.
Add 5 rounds to your Magpul PMAG .308 Gen III magazines with a CNC-machined aluminium extension base pad. Designed for 3-Gun and multi-gun competitors who need more rounds on tap without swapping magazines mid-stage.
Key Features
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+5 Round Capacity — Extends your .308 PMAG from 20 to 25 rounds, reducing stage reloads.
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CNC-Machined Aluminium — Anodised finish resists wear, corrosion, and range abuse.
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Knurled Base + Side Serrations — Positive grip for fast magazine changes, even with wet or gloved hands.
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109g Weight — Light enough to avoid altering the magazine's balance in a chest rig or mag pouch.
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Grub Screw Retention — Secure lock to the magazine body. Apply threadlocker (e.g., Loctite 243) for permanent installation.
Compatibility
- Magpul PMAG .308 Gen III (Series III) — 7.62x51 NATO / .308 Winchester
- Does NOT fit Gen II PMAGs or non-Magpul .308 magazines
Division Compliance
Extended magazine base pads are legal in most 3-Gun divisions including Tactical and Open. Check your specific match rules for capacity limits — some divisions cap rifle magazines at 20 or 30 rounds.
What's in the Box
- 1x .308 +5 Magazine Extension Base Pad (or Pack of 3)
- Grub screw and Allen key included
Installation
Difficulty: Easy. Remove factory base plate, slide on the extension, and secure with the included grub screw. Under 5 minutes per magazine. Apply threadlocker to the grub screw for reliable retention under recoil.
Complete Your Setup
Frequently Asked Questions
Will this .308 magazine extension fit Gen II Magpul PMAGs?
No. This extension is designed exclusively for Gen III (Series III) Magpul PMAG .308 magazines. Gen II uses a different base plate geometry and is not compatible.
Do I need threadlocker for the .308 mag extension?
Recommended. The grub screw holds firm under normal use, but repeated heavy recoil from .308 loads can loosen it over time. A drop of medium-strength threadlocker (blue Loctite 243) ensures it stays put through competition and training.
Is the Pack of 3 the same product as the single extension?
Yes — identical CNC-machined aluminium extensions, just bundled at a better per-unit price for shooters kitting out multiple magazines.
Are extended magazine base pads legal for 3-Gun competition in Australia?
Extended base pads are legal in most 3-Gun divisions including Tactical and Open. However, check your specific match rules for capacity limits, as some divisions cap rifle magazines at 20 or 30 rounds. Always confirm with your match director before competing.
How much extra weight does the +5 extension add to my magazine?
The extension weighs 109 grams — light enough to avoid noticeably altering the magazine's balance in a chest rig, mag pouch, or when inserted in the rifle. The 5 extra rounds of .308 ammunition add more weight than the extension itself.
