So far i'm happy with the accuracy and handling of this heavy pistol I'm starting to prefer it more than my 1911's.
So far the pistol came with 2 magazines. Are there any other .45 mags in the S&W line-up which are compatible with this pistol?
Thanks for the input.

I've got a 645,745,&845, had a 4506 and found the mags to be interchangeable among those models.
The local gun emporium has a bargin bin where I pick them up used for around $10. Full size .45 8rd S&W mags have been produced with both steel and plastic base plates, steel and plastic(in a variety of colors)followers that all seem to function. I suspect that there were improvements with the changes but on the range I've had no problems w/any I've picked up.
Suggest you do a search on this topic, believe it was covered at some point. Kevin

Great guns aren't they?.......Shop around at the gun shows. Mags seem to be plentiful.

I usually pick one or two extras up every year.

I always pick up the early mags with the steel followers. I've never tried one with the colored plastic followers but my 645 seems to like the steel followers just fine!

Here is mine with his buddy. It is a great gun. S&W did this one right.

Here's a magazine compatibility chart I made up. It's based on info I gleaned from the S&W website:

SMITH & WESSON
.45 ACP MAGAZINE
COMPATABILITY CHART
6 ROUND MAGS
4513TSW 4553TSW

7 ROUND MAGS
457 457D
4513TSW 4516
4536 4553TSW
4556 4596

8 ROUND MAGS
645 745
4506 4526
4546 4563TSW
4566 4566TSW
4567 4576
4583TSW 4586
4586TSW 845


I have this as a Microsoft Excel spreadsheet. If you would like a copy, send me an email. It's in my profile

I purchased a new unfired without a box (old dealer stock) 645. It is surprisingly accurate and feeds every type of ammo I have fed it including 185 gr. LSWC. I like it!

I had a 645 and did it shoot I regret trading it off.you will love it

Thanks for everybody's input..

I carried my 645 when I was commanding a couple of drug task forces. Great shooter. Feeds anything. Also carried a 457 as backup. The 645 weighs a ton. By the end of shift you could tell you'd been packing some heavy equipment.
Still carry my 645 on occasion. It just shoots good.

I have a 645 that was worked over by Wayne Novak. He added a 4516 upper to the 645 frame, so I can be compact(but heavy) whenever I want. It an extremely accurate weapon, I have been using it since early 90s, still like it, particularly in uniform where I can use a substantial belt to hold the rig.