i put this mag extension on my rem 1100 20 gauge. It will not even try to cycle a round now. Any suggestions? I've looked up diagrams of the gas system and the best I can tell it's on correctly. Any suggestions?
All of the 1100 magazine extensions I've seen are simply hollow tubes made to screw on in place of the forend magazine cap; they don't effect the gas system at all. Did you replace the original magazine spring with a longer one? A longer spring normally comes in the package.
Usually it is something minor on a 1100 when they suddenly stop working. I keep replacement seals and usually at least one new piston and ring kit for 12 gauges and 20 gauges. One time one got me stumped and it was the follower, so I keep a couple new followers now. I worked on a Remington 1148 tonight and it looked like it had not been cleaned behind the bolt and trigger assembly in the last 20 years to 30 years. Even though the 1148 is recoil operated; it looks similar to the 1100 inside the receiver.
That doesn't make any sense. If it is assembled properly it should run. Check the barrel seal (o ring), piston, and piston seal for cracks and/or breakage. The fact that it was running and then just stopped would suggest that you have damaged components.
Where are you located, boogerbear? I'd be happy to take a look at it for you.
That's the piston and it is supposed to be split. It looks ok in that picture.
I work in Pelahatchie but I'll be unavailable for the rest of the week. Holler at me when you get back from Florida and we'll meet for lunch or something. I bet it's something simple we can fix in the parking lot. If that's not the case I can take it home with me.
You can also double check your assembly against a schematic just to be sure. Also make sure the gas ports in the barrel are not clogged and the o ring isn't busted.