Rem 1100 O Ring ???

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From what I have read the Rem 1100 is supposed to have an O RIng slipped over the mag tube. I just got an older 1100 and disassembled it for inspection and cleaning because the fellow from whom I got it said it was not cycling. There is no rubber O ring but rather a very slim metal ring which has a split in it.

Is the O ring or barrel seal supposed to be metal or rubber?
 
Those rings belong there too. The "O" ring is missing. You would have seen it if it was there. It is a black or grey colour rubber ring.

That is why it is not cycling the gas is escaping do to the ring missing.
 
It should be rubber. That ring is the #1 headache for Remington 1100 users. Find a source of cheap o-rings and keep spares on hand. With spare o-rings around the happiness level with your 1100 increases significantly :D
 
Just so everybody knows, this can be a great way to score an 1100 for cheap, if the owner isn't aware of this simple little ring. Princess Auto, machine supply, etc. all have them.
 
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Mine had the two thicker rings or piston rings but the third ring, very narrow and metal is not mentioned or shown in the parts diagram. Was there some sort of modification that replaced the O ring with a metal one? It fits in the groove where everything says the rubber one should be.

The gun seems to be in excellent shape. Wood and metal are very nice. The original owner seemed to loose interest in hunting and the gun has not been used for years. According to the date markings on the barrel it would seem to be a 1990 manufacturing date .
 
1100

Older 1100's had the split ring seal rather than an o-ring. Remove the split ring, and replace it with an o-ring that fits snugly in the groove.
 
I went to TNT Gunworks this morning and got a Remmie O ring. Then I went to the range. Out of 15 rounds there was one that did not cycle but it was a Walmart Winnie special . The Universal load. I have found these sometimes bind in 870 Express. The other rounds were a mix of Federal cheapies, some Heavy Field loads 1 1/4 oz , an old Imperial "high brass" and some handloads.
I had cleaned the innards well last night taking it apart, gas system, trigger group etc. I only checked the gas ports but will give the barrel a good scrub and concentrate on the chamber now that I know it will cycle properly.

I am almost beginning to wish I had not promised it to my son-in-law. Oh well, it will be a while until he gets here to pick it up so I will play with it this summer.


Thanks for all the responses guys.
 
Does your 1100 have one gas port, or two?

A magnum 1100 has one gas port and cannot be counted on to run 100% with lightly loaded shells. 1100's with two gas ports, as found on 1100 skeet guns will cycle with very light shells - my 12 Ga 1100 skeet gun cycles fine even with 3/4 oz hand loads.

"O" ring life varies considerably. I have fired thousands of target shells in my 1100 with no significant wear on the O ring, but some guns seem to eat them up.
 
a good friend of mine hunts with an 11-87 .. exactly the same issue. he would burn 3-4 remington O-rings in the course of our 2 month duck season.
my advice ( and what he did ) .. was find a company that does industrial gaskets and o-rings and get a good high heat ring.. and about 10 spares .. they'll cost less and work better
 
Lots of info on this site about Rem 1100 "O" rings.

Do not use the rubber rings you can get from Cambodian Tire or a plumbing store. They are not made for the heat and the chemicals that the O-rings need to endure. They also tear and cut.That is why people go through them like candy.

Go to a hydraulic supply store and ask for a:

#21 VITON O-ring

Viton is heat resistant and chemical resistand and they will cost between $0.25 and $0.50 each. I bought a half dozen of them 2 years ago and still have 5 of them in the same bag they came in. The othe is still in the 1100.
 
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