How can I modify an 1100 Competition Master?

D

DHart

New member
I just bought a new 1100 Competition Master which has a 22" barrel and mag tube extension. I'm wondering how I might be able to adapt this shotgun for different set-ups...

Is it possible to find 18" 1100 barrels to put on it? Or find a longer 1100 barrel and cut it back to 18"?

Can the mag extension be removed for a better match to an 18" barrel?

Can a youth stock be attached to the receiver?

Other cool options for it?

Thanks in advance.
 
Pretty much anything that fits a standard 2- 3/4" 1100 will work on the CM. That includes barrels and aftermarket parts.

The mag extension just screw on in place of the regular cap. You can just screw it out and put another on that is a bit shorter. Any 2-3/4" 1100 barrel will work on it.

No 3" barrels or 11-87 barrels, though.
 
I have an 1100 Magnum that I built into a CM-style with a 22" twin-bead barrel, oversized charge handle and +3 factory extension and sling studs. There is nothing especially unique or special about the CM models with the exception of the gray stocks. That's not to say that I don't want one though!
I bought an 18" barrel that I can swap to when the mood strikes me and I can use a mag cap and shorter spring from my 870/1100 parts bin when I want to remove the +3.
Not sure if there is a factory youth stock but I am running a shortened wooden stock with a Pachmayr Decelerator pad on mine now and it handles great.

Mike
 
I found the 1100 CM on GoingBroker... it's the only one I've been able to find.

What are some good sources for barrels, stocks, and other goodies for an 1100?

I want an 18" barrel and youth stock to make up a very compact semi-auto 1100 12 ga. for home defense use. Of course I will also use the 22" barrel as the gun is supplied for competition and other purposes.
 
I've found a number of barrels around for the 1100, but the shortest I've found is 20-21"... I may just have to get a longish barrel and have it whacked... sounds like it would be a very easy mod to make.

There are short stocks around as well... this is cool.

I'm hoping the 1100 turns out to be a reliable shotgun for defense... I've heard a report or two that they aren't reliable, which surprises me. They must be one of the most popular shotguns made. But on the other hand, what gun hasn't had someone saying they aren't good , aren't reliable, whatever. With all the 1100's being used out there, there must be quite a few that run flawlessly. I do realize that the key to reliablity with a semi-auto shotgun is keeping it clean, well-maintained, and using full charge ammo.
 
Keep her clean and she'll be reliable. Mine would cycle EVERYTHING if you stayed at or kept it above 3 drams and 1 and 1/8 oz of shot. When I shot the 1 oz loads at 3 drams it would short stroke maybe one time out of 50. With low recoil buckshot or hevay field loads it is 100%. You need some pressure to run a gas gun.

Since I wanted to be able to use 1oz loads in competition I drilled the gas ports out until it was 100% with the bunny fart loads. That's an option if you must use light loads.
 
Lycanthrope... I don't yet have my 1100 CM and never have had a gas shotgun... can you tell me something? Where are the gas ports and how do you drill them out? Is this something you can do to a barrel (not affecting the gun itself)? I'm really excited to get this shotgun... should arrive by mid-next week!

Any idea how long they have been made? Does Remington still make them?

I bought mine (still NIB) from a guy who got one as a gift a couple of years ago but never shot it. They're still shown on this Remington webpage with a cool video showing one being fired...

http://www.remington.com/firearms/shotguns/1100_competition_master.htm
 
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The Remington 1100 CM is discontinued. It was made for the action shooting/USPSA 3 gun market as 1100's are about the softest shooting shotty made. Everything is the same as a regular 1100 save for the gray stocks, extended tune and larger release /feed button. I have heard they have slightly bigger gas ports, but never substantiated this.

If you open the chamber, take your barrel clamp off and then unscrew the extended mag tube and remove the front handguard, the barrel will just pull out. If you look inside the part of the barrel that slides over the bottom of the mag tube, you'll see 2 holes that are drilled up into the barrel. The gasses from the barrel jet down around the mag tube and and cycle the action. 2 and 3/4" barrels have 2 ports. 3" barrels have one.

I doubt you'll need to drill the ports. Shoot 500 rounds of 1 and 1/8 oz loads through her and break her in, then decide. I'm shooting a lot of light loads so I stepped up incrementally until I got where I wanted. You can do it gently by hand or even a dremel if you make sure to keep the bit going slow and make sure you keep the same angle as the holes.

Some prefer their 1100's wet with oil and some prefer dry. I think they need a light lube in the action and around the seals. I wipe her down after every session, which means removing the barrel and cleaning up the gas system. It's not uncommon for me to shoot several hundred at a time. I take out the trigger group every 500 rounds and rinse it out with lighter fluid. It would probably go longer, but when I'm gaming I need 100% so I clean a lot.
 
Be careful drilling the ports. I have seen quite a few barrels in the junk pile at the local stores that were ruined due to poor do-it-yerself drilling.
Also be careful when you buy a used barrel for the same reason.
Mike
 
I have a CM that runs flawlessly with heavy rounds (slugs and buckshot). It will not cycle light loads, but I don't have any desire to shoot light loads through it.
 
I don't think I would consider drilling the ports, myself.... my only desire with this gun is firing 00 buck and if it runs reliabily with that, it'll have a good long term home with me.

I will probably want to get a 28" or 30" barrel for it to try shooting trap or skeet and I guess lighter loads might be appropriate for that type of shooting... is it likely that with a longer barrel and skeet-type loads that I might have reliability problems?

I am considering a Super X2 Practical as well... I've heard they're really reliable shotguns. Any idea of which is more reliable, the 1100CM or a Super X2 Practical?
 
I've not heard anythiing bad about the SX2. I was handling one at Cabela's just the other day. I don't need another (different) SG in my house so I will stick to my 870's & 1100's though.
The SX2 can handle 2 3/4" and 3", I think.....
 
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