One of my first SBS creations. I had a standard matt black 1100 with a 21 inch rifled barrel that needed some changes.
I came to 14 inch barrel as the final product. This gun started my learning process about SBS 12 gauges, their gas needs, and their overall needs in order to function correctly.
I had purchassed a used magnum 1100, also in matt black. The magnum barrel has only one gas port due to the higher pressures.
I added a second port of the same size to the left of the existing port as it was offset to the right, they are nicely centered now.
I wanted a smaller package overall so the original Remington buttstock was replaced with a youth Speed Feed stock. Exact match. Fore end is stock Remington.
The length of pull is now 12 7/8 inches. Overall 34 inches, a good overall length for an HD shotgun. On round mag tube extension added, sling swivels, and a Hi Viz fiber optic front sight.
This gun runs really nice just as a 30 inch version would. I created this 1100 in 2014 so it has a pretty good number of rounds thru it, mostly lower power 3 dram, 1 1/8 oz loads
The 1100 is an excellent semi auto candidate to SBS. Can be pricey at todays prices. I could have gone shorter on the barrel but being a rookie, I wanted to stay on the safe side (cycling) with 1200 FPS rounds.

Love the vent rib!

Very cool!  I’m glad it operates for you, I know some of those 1100’s can be temperamental.  Likely opening up the 2nd gas port helped.

Mean shotty

It was the gavel lawn that did that for me.

Nice shotty, OP.  Will it run on mini-shells?

The mini shells? I don't think so. That think that would require working over the carrier.
I might give that a go next time out but I think it a no go.

Good eye KILLERB6....Phoenix.

Rad Boomstick man.

Is that the "slip" on Hi-Viz sight? How do you like it? Seems like the length will pick up a TON of light?

The Hi Viz sight works quite well. Its got a pair of magnets holding it on the rail plus the fit is snug.
The light tube needs to be replaced every couple of years as they tend to fade.
I've replaced this one 3 or 4 times. I think I put it on the 1100 in 2015 so its had a lot of sunlight exposure.

Update: I have started on a new 1100 project on a black 1100 Sportsman with polymer furniture. Made a good buy on this one but its too long.
Admittedly, this will be an ambitious project, especially for it to run as Remington designed it to.
Once I have some pictures and more information, I will create a new post. Remington 1100 10" Extreme. Stay tuned