Mossberg 930 Series Magazine Extension
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Will fit Mossberg 930, 935, and 940 pro tactical. Will not work with the 940 JM Pro
These tubes are sold in a few different configurations. 3 size options are available (overall lengths listed below).
You will need to select the appropriate type based on where you live, to stay compliant with the law.
Canadian Legal (all 3 sizes are blocked to +1 capacity), and Export Only +2/ +3 (these tubes are unblocked and will allow for +2/+3 capacity). Both versions of the tubes are the same in appearance and installation. The Canadian Legal tube is priced higher because there is more work, time and material involved in producing it. If you order an Export Only +2 or +3 tube to a Canadian address, your order WILL NOT SHIP.
Canadian law mandates that semi-automatic shotgun capacity is restricted to 5 rounds of the largest capable shotshell for that shotgun. The Mossberg 930 is designed for 2 3/4" inch shells and 3" shells. So, the legal limit is 5 rounds of 3" shells for the Mossberg 930. Our Canadian Legal magazine extension tube will allow you to load 6 rounds of 2 3/4" shells into your magazine tube, as per Canadian law.
CNC machined from 4140 steel.
Finished product will be Cerakoted in Graphite Black
Comes with:
- 3 Position Sling Plate
- C Clip (to install sling plate)
- 1 Million Cycle Magazine Tube Spring
- No Jam Follower - Type 3
Overall length:
- +1 - 2.25 inches
- +2 - 6.75 inches (will sit flush with the end of an 18.5" barrel)
- +3 - 8.75 inches
Made in Canada.
Compatibility:
Will work with S&J Hardware Shotgun Barrel Clamp with Light Rail and QD.
*Likely not compatible with any clamp designed for use with a tube made of aluminum, or having a plastic sleeve covering. These tubes tend to be a little thicker in diameter.
| License Required | Non-Restricted |
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Mossberg 930 Series Magazine Extension
The magazine extension fit and functioned as advertised, it is a very high quality item and looks great on the shotgun. I cut the magazine spring just over six inches beyond the extension and it works great, it’s not hard to feed the magazine tube and it fed the shotgun perfectly. -
940 Pro Tactical
I must admit, I was hesitant to pull the trigger on this. I was leaning more towards a Briley or Nordic because of the weight savings, the positive reviews and I wasn't crazy about the recessed tip on this one. However, since receiving it, I couldn't be happier with this purchased. The fit and finish is amazing, it has an awesome cerakote finish, the weight difference is negligible but the cost savings makes it a no brainer. Also I must mention that no matter who answers the phone at S&J, the customer service is always great. -
MAGAZINE EXTENSION +2
Very nice easy installation -
Mossberg 930 mag extension
Absolutely perfect fit and finish. Installed on my 940 pro tactical which comes stock with a 4 round mag tube this is an essential upgrade. The finish matches perfectly. I highly recommend! -
Mossberg 930 Series Magazine Extension
Originally wanted the GG&G version, but after seeing this on Canadian Calibre, I wanted to give it a try. After receiving this, I was awestruck by the fit and finish. The chromoly steel pairs perfectly with the barrel material and is noticeably more robust than the aluminum on the OEM 940 PRO Tactical. The ease of installation, paired with the QD clamp, completes my builds. SJ just needs to develop and manufacture a match-saver in M-LOK and HOOK-N-LOOP, and that would be the icing on the cake. Well done, Simon. -
+2 mag extension 940 Pro
Fits perfect. This +2 extension sits flush with the 18.5" barrel on my 940 Pro Tactical. I cut the spring to 22". -
+3 is awesome
I purchased a +3 mag tube extension for my 940 JM Pro. Fits perfectly! The spring and follower included in the kit are much better than stock. I highly recommend this! -
MOSSBERG 930 SERIES MAG TUBE EXTENSION MK II
Fits perfectly, spring is provided (enough to cut two different size in case you misjudged, but they say 3 inch longer than the whole mag tube should work, which I did) Included, is also an orange follower, which is nice as it is not pictured on the product page. I think it would be nice if it was mentioned and pictured. All in all a robust peice made from a single bar of 4140 Cro-Moly alloy steel, which is very nice steel (former machinist here). Canadian made is also a plus for me, since I am from Canada. No US change fees or anything :-)
