I have owned probably 9 or 10 of these over the last 20 years, all Trap Grade. They are very well built shotguns and pretty heavy. I gave each of my grandsons 1 as well as both my son-in-laws. We still shoot trap with them every Sunday when weather permits. The only problem I have had with them is the o-ring on gas cylinder and the buffer in rear of receiver. Both will need replacing periodically. These are available from several different sources on the internet. Also keep the gas cylinder OD clean just like you would any semi auto shotgun. Tom Henshaw a former Winchester executive told my many years ago that it was at the time the best semi auto shotgun made. He told me they tested it against a Remington 1100 and that the 1100 failed at about 6K rounds. They ran over 50K through the SX1 without a failure. His closing remarks were ” but how many people really shoot over 6K rounds through their shotgun?”
Steve
November 7, 2015

Interesting, I’m thinking I need an auto to save my shoulder. I love my Citori but I’m thinking the orthopods who replace shoulders are pretty fond of them too.
Mike
My Dad and myself both shoot Super X Model 1 Skeet guns. Built like tanks, but watch the buffer in the back of the receiver. Readily available on Ebay and elsewhere. Many guys at the local clubs bought them as well. Built with the same quality as the Model 12’s. Unfortunately, people shopped by price and went with the 1100’s. I’d love to find a Monte Carlo trap gun in improved modified for my daughter. Well worth the money!
I’ve been looking for an SX1 for a few months. I had neck surgery, my Model 12 left me sore for a week from 3 rounds of trap. time for something softer shooting.
My local Cabela’s had a Ducks Unlimited SX1 unfired and mint. It is no longer unfired. I need to add a pad for LOP, and may pad the comb or install an adjustable comb. Or find an MC Stock for it, I like the way the field stock fits me other than length.
I love love love the gun. The best semi auto shotgun ever built in the USA.
Did you happen to install a new bolt buffer? I put a new buffer in my SX1 and the old one literally shattered to dust during the process. Intact buffer is necessary to protect the bolt and link and stock from damage. Time degraded the original buffers completely.
It is not a difficult operation and your gun likely also needs a new bolt buffer if it was still new in the box. Excellent video on YouTube how to do it.
And I certainly agree, the gun is a real pleasure to shoot.
-Mike
Yup, Mine is an early one, I installed a new buffer, and a little blue locktite on the rib screw. I was going to put a Pachmeyer old english on it, but I found an monte carlo stock on ebay, I was really pleased the wood figure is great, I can refinish it or use as is, and it already has a pad. I will keep my eyes open for another fore end and tuck my original stocks away should I want to make a field gun of it. It sure is a soft shooter and an appropriate replacement for my model 12 trap which I will likely sell.
Own and have hunted two extensively. 2 3/4 gun, fixed chokes, very well made gun with very good ergonomics for the day.
Bolt buffers and gas system O rings are consumables, the gas system O rings need to be installed in the correct order.
I don’t hunt them anymore, but they are still classics.
November 7, 2015

I’m hoping quality reaches down a few generations. I saw an almost new SX3 at the orphanage while I was drooling over the 20ga Model 12 in another thread. Yep, they both followed me home. I want to try a gas gun for clay birds to give my shoulder a break and I figured this one was cheap enough and it seems to fit me well. It uses Invector Plus tubes so I won’t need to invest much to try it out on the five stand field tomorrow.
Mike
Another darn near followed me home from the orphanage last week, if they mark it down lower than the current 199 I may be forced to purchase it. It is very well worn but not abused. Mod choke, I think it has a rib, but might have been a plain barrel. I might just need to get it if ribbed, 28″ mod is a good barrel for the field.
The beauty of a high quality machine made gun, it’s easy to mix and match parts to make an SX1 most anything as long as it’s 12 gauge. I have heard there is one 20 ga. prototype somewhere. I reckon the 12 gauge did enough on it’s own to kill Winchester. Parts are plentiful so far, and they really don’t break as long as their issues are addressed initially, esp. guns that have been tucked away for decades. I am sure damage and malfunction would have resulted otherwise. My bolt buffer was all crumbly, not sure the loctite job was really necessary at all. Glad I have LOTS of experience with button head hex screws. Really important hint use a brand new unworn hex key, be certain the tool is bottomed in the hex. The hex is very shallow on button head screws. Mine was a very early gun and that hex screw was going nowhere as it was. Would be really easy for a guy to strip that one, I might be inclined to just keep an eye on it, I will anyway. What a gun!
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