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AGP Arms Springfield XD9/40 and XD MOD.2 +4 Magazine Extension

$20.00

This kit includes a new 20% extra power spring and are the only extensions for the XD9 and XD40 (also fits new XD Mod.2) that have locking plates to keep them from popping off your mags. This is a +4 extension for the 9 and +3 for the 40 that does not prevent the slide from locking open after the last round has been fired.

Extension adds 23.5mm to the bottom of the factory magazine.  

NOTE: These will not fit on single stack magazines sold in California models.

NOTE: These will not fit XDM models

Included Parts:

Glass Filled Nylon Magazine Extension
Hardened Steel Locking Plate
+20% Extra Power Spring
Installation Instructions

Dealer Inquiries Welcome for 100+ Qty.

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Description

This kit includes a new 20% extra power spring and are the only extensions for the XD9 and XD40 (also fits new XD Mod.2) that have locking plates to keep them from popping off your mags. This is a +4 extension for the 9 and +3 for the 40 that does not prevent the slide from locking open after the last round has been fired.

Extension adds 23.5mm to the bottom of the factory magazine.  

NOTE: These will not fit on single stack magazines sold in California models.

NOTE: These will not fit XDM models

Included Parts:

Glass Filled Nylon Magazine Extension
Hardened Steel Locking Plate
+20% Extra Power Spring
Installation Instructions

Dealer Inquiries Welcome for 100+ Qty.

Reviews (16)

Write a review

XD40 magazine extension

Ended up only being a three round extension instead of the advertised 4 additional rounds. Definitely doesn’t look like it was designed to match the XD40 grip but instead is a weird smooth extension that is smaller in diameter than the grip. Fortunately, no issues feeding even with a full mag dump.
Posted by JP on 30th Jun 2022

This is on all my mags

I had a few of these extensions and I like them so much that I got more for the rest of my XD mags. They look like the gun was designed to have them on it. Getting 20 rounds in tends to require the help of a good speed loader but it can be done and feeds the first round normally. When assembling or disassembling it, beware that the extra power spring can cause extra power flying parts!
Posted by Sean on 5th Feb 2021

Only +2

I only got +2 from my 16 round mag, and with the extension the mag release is far more difficult to depress on either side.

Not happy that it's not +4, but I can beef up my thumb squeeze and I'll take the +2
Posted by Ari on 31st Dec 2020

Additional info

SKU: AGP-XD-940EXT
Width: 3.00
Height: 1.00
Depth: 1.00
Shipping: Calculated at Checkout