The Sig P320 +3 Magazine Extension by IMI Defense is engineered to deliver a reliable, no-compromise capacity upgrade for your Sig Sauer P320 pistol. Designed to add three extra rounds while maintaining perfect feeding performance, this extension fits 9mm and .40 S&W magazines and integrates seamlessly with compact, standard, and extended P320 magazines—without affecting grip comfort or weapon handling.
Constructed from lightweight, reinforced space-grade polymer, it offers exceptional durability against impacts, chemicals, extreme temperatures, and UV exposure. Installation is fast and straightforward: simply replace the factory floorplate with the extension and the included locking plate – no spring replacement required.
Ergonomic side and front texturing improves grip and control, ensuring secure magazine handling during reloads. The extension is fully compatible with a wide range of SIG P320 grip modules, including AXG, X5 LEGION, XFULL, XCARRY, XCOMPACT, and Nitrone frames.
Upgrade your P320 with the IMI Defense™ +3 extension and enjoy increased capacity, enhanced handling, and uncompromising operational performance.
Sig P320 +3 Magazine Extension – Key Features:
Adds +3 rounds to your P320 magazine
Made from space-grade reinforced polymer
Highly resistant to impacts, chemicals, heat, cold, and UV
Compatible with SIG Sauer metal magazines
Works with AXG, X5 LEGION, XFULL, XCARRY, XCOMPACT, and Nitrone grip modules
Easy and quick installation with included locking plate
No spring change required
Available in Black, OD Green, Desert Tan
Made in Israel
Technical Specifications
Weight: 30 g
Dimensions:
Length: 4.6 cm
Width: 3.28 cm
Height: 2.19 cm
Additional Information
Weight
0.1 kg
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Shipping & Returns
Domestic Shipping – For orders shipping within the USA*
Shipping Option
Cost
Delivery Time
Free Shipping – Regular Registered Shipping –
*Please note there is no option of adding Insurance protection to this form of shipping
FREE For orders above 199$ 12.95$ For orders below 199$
8-16 Business Days
Priority Shipping
14.95$ for orders Above 199$
17.95$ For orders under 199$
4-12 Business days
Express Shipping (UPS)
Cost will depend on the destination of the package (calculated shipping cost can be seen at checkout)
3-6 Business days
* For qualified orders. If an item is not available in our US warehouse it will be shipped from Israel (in this case the delivery times may be slightly longer).
International Shipping – For orders shipping outside USA
Free Shipping – Regular Registered Shipping –
*Please note there is no option of adding Insurance protection to this form of shipping
FREE For orders above 199$
12.95$ For orders below 199$
14-35 Business days
Priority (Eco Post)
14.95$ for orders Above 199$
17.95$ For orders under 199$
8-18 Business days
Express Shipping
Cost will depend on the destination of the package (calculated shipping cost can be seen at checkout)
3-8 Business days
*International TDI shipments – Orders shipping outside of the US will be shipped via USPS / UPS for a fee of 25$ (shipping cost can be seen at checkout).
Returns & Exchanges
All return claims must be made not more than 7 days after the item has been received.
Returns must be sent back within 30 days after delivery.
Exchanges are subject to product availability and may be subject to additional shipping fees.
To be eligible for a return or exchange, the item must be in its original condition, unused, and with all original tags and packaging.
You may return your item within 30 days from the day it was delivered to you in order to receive a refund. Please notify us of your intent to return the item within 7 days of receiving it. The item must be in its original condition and packaging. Shipping costs are non-refundable. For full return details, click here to view our complete return policy.
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