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The Panzer Arms FS1 PRO +3 magazine extension is a capacity upgrade To increase you to a maximum of 7+1. This kit comes with a spring and magazine extension with a straightforward installation that will get you back up and running in record time.
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We currently ship within the US, with more countries coming soon.
Final cost and dates are confirmed at checkout.
🇺🇸 Ship from USA · On Agora since 2026
$39.95