M&P 6 ROUND MAG EXTENSION

Your Price: $40.00

Part Number: FCS-MP 6 MGEXT

Availability: In Stock.

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Customer Reviews

This Smith & Wesson extension adds 6 rounds to your magazine. Easy assembly. Made to match our S&W magwell. Works on All double stack M&P Mags 9mm and 40. If you do have a .40 it will only be a +5 extension. Some 9mm mags will only fit +5 until they wear in. The 6th will be very tight.

Stock Spring is all you need.

Black hard anodized aluminum. Color anodize will vary with each batch

*CAUTION* Our bases and extensions WILL have problems when dropped repeatedly on concrete. They are Hard Anodized, but they are still aluminum parts that will take on damage. When installing the extensions, only tighten the back plates down until secure. The plate may crack or break if tightened down too much.

MADE IN THE USA

KNOW YOUR STATE AND LOCAL LAWS

Installation Instructions

Please View the youtube video at:

https://www.youtube.com/watch?v=TUEIX6JqDQU&t=4s

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Average Customer Ratings

4.5

Mr.

I don't say any of this to bash this company or product, in fact it is just the opposite. I love this product and company and have recommended it / them to several friends. I do, however, think several improvements can be made. First and foremost, watch the install video. This was make your install much simpler (filing down your feeders is a must, but you don't need much). Here is the problem I have. It is sold as a +6 extension. In reality, yes you can fit 23 in the magazine. However, with the slide forward, you would have to use a hammer to get a 23 round magazine to lock into the gun. Slide racked to the rear, no problem. This just is not practical for a duty carry magazine though. To solve this, I just want to +5. It still fit snug with the slide forward, but much much less force required to seat. This brings me to my second issue. The install video recommends to "stretch the factory spring" to give more force for the increased capacity. Please don't do that. I was getting a failure to slide lock on about 80% of my last shots, even with the springs stretched. I never had a feeding issue, but this is also not acceptable for a duty carry gun. I upgraded to a plus power spring (you can find them relatively cheap elsewhere) and it solved the issue no problem. Further the springs had returned to the normal size when I removed them. Unfortunately this reduced the capacity to +5 (but the same issue as above persisted, so I carry with +4 now). 21 is still better than 17, but it isn't 23 obviously. These are just my two cents in what I experienced with the two I purchased. As far as the pros: this company is great to first responders, so I appreciate their support.. Also, the exterior profile is great. It looks much nicer than the other ones I have seen floating around from other companies (including much more expensive versions from more well-known brands). The side grooves make for easier reloads, especially when combined with their magwell IMO. Even the logo on the base is sharp and not overdone. The coating did scratch each time it was dropped from less than three feet though. Shipping was also very fast. After you file down the feeders, installation is super easy. Buy with confidence, but know the limitations. Stay safe!

Did you find this helpful? 26 of 28 Found Helpful

Reviewed by: Steven Prats from Spring Valley on 11/11/2020

Great product, be aware of the caveat

I installed the +6 to an M2.0 compact 15 round magazine using the instal video on youtube with no issues. I did file the follower slightly to round the edges. The stock spring works with this, but round 21 is extremely hard to load in the mag. The caveat, at least in my personal experience, is that the mag is very hard to seat in the magwell with the slide forward when I finally squeezed in the last round. You really have to slam it in there with force. It is fine loading the mag with the slide locked back and it does put a round into battery when the slide is released. Also, the gun will cycle and load the 21st round when the one in the chamber is fired. Warning to those that wish to tamper with the spring. I clipped the spring, which helped take some of the pressure off, but this caused the mag to fail to lock the slide to the rear due to less pressure on the follower. I had to replace the clipped spring with a standard spring to get the mag to be able to lock the slide back to the rear. The spring does get a little better over time in regards to ease of getting the last round in and loading the mag into the magwell with the slide forward. Just be aware it still needs extra force to slam the mag in when the slide is not locked back to the rear.

Did you find this helpful? 5 of 7 Found Helpful

Reviewed by: George from Dallas on 2/16/2021

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