G20 Gen 4 Magwell
This is my second magwell from SLR. the first was for my G19 Gen 5 with the half mood cutout. I loved it so much I purchased this one and plan on adding them to most of my glocks in the future. A+ fit and finish!
USE A 2mm Wrench to secure screw
Due to the G20/40 frame variances year to year it is recommended to use the SLR Glock 10mm Floor plate (Link Below)
Some frames will not allow easy mag retention in frame when using magwell. Frame to frame this can vary.
Our Glock 10mm Floor plates solve this issue.
Gen 4 G20/40 Magwell Adapter
For SF Models only
Fits Gen 4 Glock 20 and Glock 40 10mm pistols
Fits Gen 4 Glock 21 and Glock 41 .45ACP Pistols
- 7075 Billet Aluminum
- Includes ultra low-profile billet attachment screw
- Made to fit each gen and model like a glove. No "one size fits all" like many out there
- Will work with 10-round mags (for states with capacity restrictions)
- Will not work with back straps
-Does not work with TT extensions currently unless pin on extension is shortened.
Magwell screw only needs to be finger tight. Do Not Overtighten.
NOTE- install over front lip of grip before pushing rear into place.
DISCLAIMER: This product is not manufactured, authorized, endorsed, or warranted by GLOCK. GLOCK does not warrant or represent that this product is compatible with GLOCK pistols.
DISCLAIMER: “GLOCK” is a federally registered trademark of GLOCK, Inc. and is one of many trademarks registered by GLOCK, Inc. and GLOCK Ges.m.b.H. Neither SLR Rifleworks, LLC nor this site are affiliated in any manner with, or otherwise endorsed by, GLOCK, Inc. or GLOCK Ges.m.b.H. The use of “GLOCK” on this page is merely to advertise the sale of GLOCK pistols, parts, or components. For additional genuine GLOCK, Inc. and GLOCK Ges.m.b.H products and parts visit www.glock.com
This is my second magwell from SLR. the first was for my G19 Gen 5 with the half mood cutout. I loved it so much I purchased this one and plan on adding them to most of my glocks in the future. A+ fit and finish!
So far, the item I received appears to be of exceptional machining quality. The opening is wide enough to assist with reloading, but narrow enough to not be obtrusive. The only slight complaint I would have is that there is some slight play to the magwell due to the single point of attachment.
This is my second magwell from SLR. the first was for my G19 Gen 5 with the half mood cutout. I loved it so much I purchased this one and plan on adding them to most of my glocks in the future. A+ fit and finish!
So far, the item I received appears to be of exceptional machining quality. The opening is wide enough to assist with reloading, but narrow enough to not be obtrusive. The only slight complaint I would have is that there is some slight play to the magwell due to the single point of attachment.
Finding 10mm aftermarket add ons that work are hard to find. The magwell combined with the mag extensions is an awesome combo and makes reloads much easier.
Attention to detail is there! There isn’t much out there for us G21 guys but this is it anyway. Buy the mag extension too it works perfectly with the magwell.
Wanted a slim magwell for my G20 gen 4 and this definitely fits the bill. Installation was easy without any need for alterations. Fit and finish were top notch and I'm very happy I went with this. Highly recommended!!
Fits great, low enough profile where is doesn’t get in the way.
excellent fit, I purchased on for my G45 and liked it so much I bought one for my G21. If you have bigger hands it really improves the feel.
The machine work and finish of the SLR magwell is sexond to none as well as adding a great aesthetic to the large frame Glocks. The only reason for not giving a 5 star rating is the need to remove a bit of material from the magazine base plates (factory) for them to seat/lock properly. Dont hesitate buying this product.
I bought the GL-MW-20-G4 To see if it would fit on my Gen 3 G20SF as there are very few options on the market. It does not fit the Gen 3 G20 SF frame. However it only takes a slight amount of modification to make it work. That being said I have to agree with the reviews that say it is to tight on the side of the magwell causing loaded mags to stick when dropping mags. Again slight mod to the magwell of the frame and it’s good to go.
It fits perfectly. I had no problems with magazines dropping, but I also have SLR Rifleworks 10mm mag extensions. On my glock 21 mags I only had one that kind of sticked. Great product as usual.
