A simple swap for the MAC 1014 mag tube fore end (two more 2 3/4" shells), that comes with an extended mag tube spring. The extension I received had a slightly marred finish, rub marks along the shaft (which had no impact on function--just aesthetics). Funny coincidence--I received a Tokarev Titan mag extension in the same order and that one had a marred finish as well--go figure . . . There are no directions or troubleshooting guidance with this extension/spring. Swap-out and installation is relatively simple; but for the inner tension ring-washer at the open fore end of the mag tube (it can be challenging if you don't have an appropriate tool). Also be mindful of the mag spring under tension (eye protection recommended). Some folks have found it difficult to fully load the magazine when reassembled--the last shell won't fully seat in the tube. If the reinstalled ring-washer is flush with the fore end of the installed mag tube extension, try unscrewing the extension a few turns to provided a bit more internal mag-tube length. Snug the end cap to secure the barrel and try reloading. Readjust tube length as needed. Overall, the extension works as designed, but it can be a bit fussy to get it dialed-in to load to its new full capacity. Be patient; it'll work.

went on just fine fit like a glove on my new mac 1014

Extension wouldn't align and shells would bind...I discovered two solutions and settled on this one: with the barrel fully seated and the extension in place, back off the extension about 1/2 turn until the alignment is acceptable... Non-alignment at the 3 and 9 o'clock position will exacerbate the binding...I placed witness marks on the extension and coupler...I believe the compression from the magazine/barrel nut will keep the extension from rotating...If you put 6 shells into the tube and it binds, you'll need to further tweak the extension...I tried dummy, Federal, and Winchester shells with no stoppage...not ideal, but so far, it works.

This extended mag for my 1014 breacher looks awesome and works great . It was a very easy install around 2 minutes and done . I recommend this extension.

Works flawlessly with no issues. Good quality. I am very satisfied with this purchase.

It adds more rounds to the capacity

I put it on and the shells would get hung up. I took it back off and re did. seems to work better can only fit 6 rounds not 7?

No instructions. Youtube has several people doing the installation differently.

No matter what I did or how I threaded the extension on, I could not get more than 5 shells into the tube with the extension installed. Every time I would get to the 6th shell, I could not load it and the spring and follower would get stuck, requiring the tube to be taken apart again. Wasted 3 and a half hours trying to make it work. Save your money and buy a full length tube instead. Only reason I did not rate 1 star was because of the excellent customer service and the quick, simple return process.