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Questions & Answers
Will these fit Glock 30 round magazines? Expert Answer

No, this is designed for the curved MPX magazines.

by Ethan C., Gear Expert, December 19, 2019
Customer Reviews
Helpful Positive Review
Great magazine clamp by Joe, Verified Owner, September 21, 2021
Works really good and holds magazines together pretty well. Keeps enough space so it wont effect the ejection but can effect the ejection port cover. If you are looking for a mag clamp for your MPX, this is the one to use.
1/1 found this helpful
Helpful Positive Review
Perfect fit by J Car, Verified Owner, April 2, 2022
Clamps for coupler align perfectly with the notches on magazine for a secure grip. Does add a considerable amount of weight though with 2 fully loaded magazines. Something to consider if you don't want your sig to be front heavy.
1/1 found this helpful
Helpful Negative Review
Doesn't fit magazines currently issued via Sig by Blix, Verified Owner, April 18, 2023
I'm sure this works great for the older Gen magazines, but the description says it fits factory magazines...IT DOESN'T. The current Sig MPX K factory magazines, which are the Thrill Gen 2 mags, do not fit at all.
5/8 found this helpful
Most Recent Reviews
Great coupler for mpx by Z, Verified Owner, April 20, 2025
Fits like a glove on my sig mpx 9mm magazines. I used it on my shorter 20 round mag.
Most Recent Reviews
Does NOT fit THRIL mags by PC, Verified Owner, January 7, 2025
They seem well made for what they are. However they don't fit current issued SIG THRIL magazines. This should be updated in their specifications as well as their packaging. 3 stars for a well made product, loses 2 stars for poor marketing.
Most Recent Reviews
Mag coupler by Daniel Williams, Verified Owner, April 6, 2024
Great product! High quality material really grips the mags.
Read All 11 Reviews
Gun Model: SIG Sauer MPX Condition: New Fabric/Material: Polymer

Code: 7UD-MGC-MPXCINCH

MPN: MPX-CINCH

UPC: 738435619244

List: $27.05Save $1.06
$25.99

made-in-usa-flag Made in USA

Help support American manufacturing! Marked models of this product have gone through rigorous review and been certified by the manufacturer as Made in the USA.

Product Info for Lancer Magazine Coupler Sig Mpx X-cinch Fits Factory Mags

The MPX CINCH was developed for the SIG MPX magazine. The Coupler was designed to match the unique contours of the polymer body and align with the molded ribs ensuring the magazines are aligned and held securely without obscuring the view of the rounds.image

Specifications for Lancer Magazine Coupler Sig Mpx X-cinch Fits Factory Mags:

Type/color: Magazine coupler
Size/finish: Sig mpx
Material: Polymer

Package Contents:

  • Lancer Magazine Coupler Sig Mpx X-cinch Fits Factory Mags

Lancer Magazine Coupler Sig Mpx X-cinch Fits Factory Mags Orderable Models

List of Orderable Models

  • Lancer Systems Mpx X-cinch Mag Coupler - MPX-CINCH , MPN: MPX-CINCH , UPC: 738435619244 , Code: 7UD-MGC-MPXCINCH

Lancer Magazine Coupler Sig Mpx X-cinch Fits Factory Mags Unavailable & Discontinued Models

List of Unorderable Models

  • USED Lancer Magazine Coupler Sig Mpx X-cinch Fits Factory Mags, EDEMO1, Used, Condition Like New , MPN: MPX-CINCH-EDEMO1 , Code: 7UD-MGC-MPXCINCH-EDEMO1
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