Yes most 870 butt stocks will fit on the 1100 as long as it doesn't collapse (see Sage Sidewinder). the stem that comes out of the back of the reciever is full of mud(as was the rest of the gun when I bought it).
As far as forends go, I've only seen the factory checker'd and surefire light. Even if I remove the pin in the stem, the spring won't release. Yes most 870 butt stocks will fit on the 1100 as long as it doesn't collapse (see Sage Sidewinder).
The company also did its part during two World Wars as a manufacturer of military arms and munitions.
In addition to the M1911 semi-automatic pistol, the Browning Model 1917 heavy machine gun, and the Model 1917 bolt-action rifle, Remington also manufactured the Pedersen device.
Removed the original wood and added a Choate Mark 5 synthetic stock (13" LOP so the wife can shoulder it) and a Remington synthetic fore end.
Replaced the 26" skeet barrel with a Remington Competition Master 22". I wasn't going to add the breaching choke tube, but when the wife saw it, she said "you HAVE to put that badas* thing on the gun" (and she must be obeyed).
Lite then fitted a lock, stock, and furniture, and upon completion, he found that it shot well.
After showing his new gun to area residents, he soon had a large number of orders for gun barrels.
As far as forends go, I've only seen the factory checker'd and surefire light.
a 1100 I built a few years back, the barrel is an un-cut 21" factory barrel with a full choke and vent rib I found on e Bay.
The post-war years brought smaller pocket pistols and deringers, the Remington-Smoot metallic cartridge pistols, Remington Single Action Army revolvers, rolling block rifles and pistols, slide, autoloading, and hammerless shotguns, and the Remington-Hepburn falling block rifles.
During the 20th century, Remington has established itself as a manufacturer of high quality sporting arms, especially with upland game and bird hunters.
In 1844, Remington's oldest son, Philo, joined him in his business.