Reviews & Ratings for Strike Industries Extended Magazine Plate for SIG SAUER P320, 9mm — 15 reviews — Page 1

These look absolutely incredible when used in the Wilson's combat grip modules!

Its nice to have the +5 but the springs get stuck a lot. I dont load mine to 22 because if you load the gun with one of the chamber it overloads an drops the mag. I would say and spend the money on a new Sig 21 round magazine

The reason Strike Industries said it' not compatible with the 21-round magazines was because they only provided you with the 13-coil spring. The SI Aluminum Extended Magazine Plate comes with 14-coil spring. I ended up buying the 14-coil spring from Henning Group for less than $8 and now I have a 26-round magazine that will work with an SI EMP Pocket Clip and magwell. No issues with functionality and locked back on the last round and you can drop these plastic EMP on the ground all day.

Make sure to do your research first. I carry a p320 x-vtac, and i wanted to up my carry abilities from 17. Surprisingly, 2 of the extensions transformed my 17rd mags into 23rd mags. I have no complaints. Just make sure you install them correctly. It can be a bit confusing on how to get the spring and mag in place, but it's easy when you figure it out. Make sure to screw the grub screw in all the way with the metal flange put in the correct way. I'd honestly buy again. But for the price of genuine sig mags, i just buy extra 21rd extended mags from Sig. Cheers

The P320 already has a massive capacity, and even though I don't hear too many folks using a 320 as their carry, I do. And now my capacity is 20 + 1 instead of the already generous 15 + 1. I will admit that the installation was a bit tricky, but anyone can do it if you think it through.

P320 Compact is different than the Carry. Compact has 15round steel mags while the Carry comes with 17 as it’s the “full” length handle part.

These will lock into the steel mags that come with a P320 Compact but won’t lock in as the tabs interfere with the bottom face of the grip. Some modifications would be needed to run these extensions.

The SI Extended Magazine Plate is a great addition to your factory Sig 17rd Magazines. It is compatible with base model P320/M17/M18. I cannot speak on behalf of the other variants. Install is super simple too. Worth the money.

Works on all factory grip modules except the AXG and X-frames with factory magwells. Otherwise great product, works as designed and increases capacity and looks good. The new spring works well and no failures to feed or lock the slide back when empty. Will buy some more for my Glock

Ordered these a while back for a grip module I was waiting for, worked in the m18 one but the one that just came in does not work, it will stay up but not lock, and too late to return, bummer that this did not end up working

We purchased a few of these for my buddy(he has a 320 with an axg frame). Quality looks looks/feels good. We were hoping it would slim down the profile of his 15 rounders where they would fit in the axg frame. It didn't work that way, so we tried on his 17's, which worked fine. I REALLY like the thought of adding a retention plate at the bottom to prevent accidental disassembly. I will echo what others have said: 1. These do leave a noticeable gap between the top of the extension and the bottom of the frame, even more so below the Backstrap. The video shows it fitting good on a m18/m17, so that's something to consider.---2. This will fit 15rd mags, but the mags will not fit in a factory p320 compact frame after installation without modification. So, 15s will be rendered useless without modification. Overall build quality seems good and I will test function in a couple of days. If I don't report back, then everything went fine.