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Plus Two Magazine Extension Remington 870 1100 11-87 ProMag Fits Remington 12 Gauge Shotguns

Pro Mag
Ships from Warehouse 1
Typically ships the same business day when ordered before 4pm CST.
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Add two or even three more shells to the capacity of your factory stock magazine tube with our ProMag Magazine Extension. Designed for use on 20" barrels, this mag tube extension measures 9" long and allows you to add 3 additional 2 3/4" shells or 2 additional 3" shells.

Fits Remington 870, 1100, and 11-87 and is backed by ProMag's Lifetime Warranty.
Made in the USA with a lifetime warranty.

ProMag Industries
10654 So. Garfield Ave
South Gate, CA 90280

Item#: 03096,SHT-165,3-1023437,9-58101
Total number of Reviews: 4

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5.0 5
"This will be slightly longer than your 18.5\" barrel. No big deal for my application due to my compensator. It's solid enough not to need the barrel clamp and it holds the barrel on VERY WELL!! Didn't budge after 50 shots. Don't install it too tight or you will have a heck of a time getting it back off and function check it a few cycles with everything well lubricated and clean. If you can't get more than 4 shells in the tube after you install it its because of the dimples in the factory tube; don't panic its nothing a Dremel tool cant fix."
– D-Tac
5.0 5
"Fits my Rem 870 Express magnum well. All I had to do was file the dimples in the mags. Buyer beware, it does not come with a spring, and this is not in the description either. Still half the price than buying directly from pro-mag."
– TheAN
4.0 5
"I bought this for my Remington 870 Express. I had an 18\" barrel on it at the time and thought it would be a great fit; however the tube extended way beyond my barrel and looked ridiculous. Luckily I had more barrels to choose from. The tube itself is good quality and with some minor adjustment to the spring it can hold (3) 2 3/4\" shells. This tube is dead even with my 20\" barrel. The finish is ok. Matched my barrel but the barrel clamp is high gloss paint and sticks out like a sore thumb against the rest of the setup. Guess I\uFFFDll be hitting that with some Duracoat."
– Sam
3.0 5
"This worked well as it was supposed to, but the magazine/barrel clamp it came with loosened pretty easily. It does not specify above, but it holds 2-rounds of 3\" shells, 3 rounds of 2 3/4\" shells. I bought this for my Remington 870 Express 12ga. with 18\" barrel and the end of the magazine overshoots the end of the barrel by a good 2-3inches. I needed a 2-round extension of 2 3/4\" shells to be flush with the barrel.other than my lack of research/judgement.... good product."
– TheDude