Colt Series 70 1911 barrel & bushing replacement
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Thread: Colt Series 70 1911 barrel & bushing replacement

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    Colt Series 70 1911 barrel & bushing replacement

    Should a factory Series 70 & bushing be able to "drop in" as a replacement for one in the gun already. I got one off another site that is in very good condition, mine is well shot on the gun I recently purchased. When I try to reassemble the gun it wont go ! I even tried just replacing the bushing on the original and it gets stuck and wont go into battery? Both barrels are stamped Series 70 and both have the "fingered" bushing. Is this a gunsmith issue? What am I missing here..any suggestions..

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    Sometimes they drop in,sometimes not. A gunsmith may not be required but proper tools and knowledge are required to get a proper fit. As you discovered the bushing May have nothing to do with the fit. The lugs in front of the barrel hood have to line up with the cuts on the inside top of the slide. With the bushing removed from the barrel see if the barrel lines up properly in the slide.
    Last edited by sturmgewehr; 08-15-2019 at 06:59 AM.
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    And another thing to remember is the collet barrel bushing was used from 1969 till at least 1988. I have them in a couple 1988 GCNM MkIV Series 80s made in 1988 I have in my shooty collection. So lots of pistols over a pretty good time frame. Even if the barrel is stamped MkIV Series 70 the range is still 1970 to 1983.
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    Keep in mind that the Series 70 Mark IV NM and standard barrels are different in configuration. They both have barrel hoods that are positioned differently. The NM is offset slightly and won't work properly in a standard government. The two limiting factors on putting a new barrel/bushing set in an existing barrel are the link and lug position and the recoil spring. Often a well used recoil spring doesn't have the power to pull the barrel up into battery. The other fact is the fit of the lug and link on the slide stop. If that is too tight it won't be able to cam into position. The spring is easy to swap out. The link/lug may require some professional fitting or at the very least a lapping in. You can check the rest of the barrel fit on the locking lugs by disassembling the slide and removing the old barrel. Then with the slide upside down install the barrel and bushing and push it into battery while you watch. It should snap into battery with finger pressure. If it doesn't then suspect that maybe it might be the locking lugs or hood. If it does then it's either the link/lug area or the spring itself. At that point, I personally would exchange the link on the new barrel with the used one on the original barrel and see what that does. While you have them out check the links against each other. They should be identical and unfinished in the white. If the link on the new barrel is numbered or lettered , it is not a Colt link and that may be your problem. Overly long aftermarket links will prevent the unit from functioning.

    When Colt sold these kits they all came boxed with barrel, bushing, link and pin. They were alledged to be a drop in though in all series 70 pistols they functioned tightly and required a lot of lube when freshly new. The only difference in the kits was NM or Government and as I mentioned they are not interchangable at all. The legend on the hood should be identical to the legend on the hood of the barrel you are replacing. In recent years there have been a lot of companies that have made barrels. They don't use the same legend or markings as Colt. If the barrel you are installing doesn't have the same identical markings as the one in your pistol then you have been sold one that is not a Colt.
    Last edited by flintsghost; 08-16-2019 at 11:44 AM.
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    I put a Series 70 Gold Cup barrel and collet bushing in my Combat Elite years ago and it's been extremely accurate and has never coughed a bit since doing that.
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    Just with the barrel dropped in works fine, does snap into battery. I will mic out the link and see if there is a difference. Thanks for the info..

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    Quote Originally Posted by SnidelyWhiplash View Post
    I put a Series 70 Gold Cup barrel and collet bushing in my Combat Elite years ago and it's been extremely accurate and has never coughed a bit since doing that.
    The reason it worked is because the Combat Elite is not a Series 70 and since the late 80's almost all Colts have had off set barrel hoods. Try putting your 70 Series Gold Cup barrel into a Series 70 Government That was actually made before 1985 before you say that I'm wrong.
    Last edited by flintsghost; 08-16-2019 at 04:35 PM.
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    There are after market link kits that come with four or five different center to center hole dimensions. Can’t remember if they’re in 5 or 10 thousandth increments.

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    Update

    Got it !!!! The link pin was just out on one side so little but with the close tolerance it was enough to prevent it from working. Used a punch and moved it back over and it all went together with no further problems. And it was a Series 70 marked barrel that I got as the replacement. Thanks again for all the advice, greatly appreciated..


 

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