Will these work for sig mpx mags?

The Sig butt plate looks to be a tab bit bigger than the Glock 33 round magazine. You would need to compare the size of the Sig butt plate to the size of the Glock 33 round butt plate at the gun shop. If it is close it will fit. I used soapy water to work the mag assist onto the magazine. Very important to protect the 9mm butt plates , some come off when they hit a hard surface , spilling all the ammo out. Good luck!!!

Will these fit pmag 35 ev9 mags?

I have run these on colt mags, B&T mags and standard EVO mags. I know that’s not your question but may help

Would this fit a Vector magazine?

It fits on all my Kriss mags that are Glock 9mm factory mags that are extended. It doesn’t fit mags that go flush with mag well or any that have zev, or bigger base plates, works best with colt 9mm or smg mags. Also works with Sten sterling magazines

ASIN	B0041FYIYO
Best Sellers Rank	#60,353 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #497 in Hunting & Shooting Gun Stock Accessories
Brand	Magpul
Brand Name	Magpul
Closure Type	Open Top
Color	Flat Dark Earth
Customer Reviews	4.4 out of 5 stars 233 Reviews
Global Trade Identification Number	00873750000138
Included Components	Magpul MAG003 Original Mag Assist (Pack of 3), Flat Dark Earth
Item Type Name	MAG003 Original Mag Assist
Item Weight	1.6 ounces
Manufacturer	Magpul Industries Corp.
Material	Polymer
Material Type	Polymer
Number Of Pockets	1
Pocket Description	Slip Pocket
Team Name	Magpul
UPC	873750000138

MAGPUL Original Magpul®

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