Mark 4 22/45 Frame





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Took a while but they finally got the Mark IV 22/45 released

This is a pretty MAJOR rework of the old Mark pistol but still very much the same pistol

The single most notable change is the ONE BUTTON take-down that DRASTICALLY changed Field Strip on these.

They also added an Ambidextrous Safety

Once again unlike the the Standard frames the 22/45 is Polymer and it's LIGHT

These frames have an auto Bolt Stop that holds the bolt open after last shot.
The magazine is what operates the stop, weak magazine spring = weak bolt stop.

The magazine release is still a Push Button on Left side of frame.

* Grips are unique to this frame although MK3 grips could be modified to fit.
* Mark 4 frame is NOT compatible with ANY of the older uppers.
* You can run a Mark 2 or 3 Bolt on this frame.
* SO FAR all MK4 uppers are interchangeable with all MK4 frames

* Trigger and lock work parts are NOT  100% interchangeable with Mark 1, 2 and 3 frames without modification.
* Mainspring is built into the MK4 frame so the old mainsprings play no part here.
* You MUST have a Mark 3 (or 4) magazine (90231 same part # for both) for this frame
Mark 3, 22/45 Frames





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The Ruger LITE is STILL a 22/45, soak that bit of info in please!

The Mark 3 version of the 22/45 is slimmer and lighter than the MK2 and made of Zytel now (a better polymer)
There are TWO versions of the Mark 3  22/45 frame
FIRST version had fixed grips
SECOND version had removable panels
Otherwise they are very much identical
THESE ARE THE LIGHTEST WEIGHT MARK 3 FRAMES ON THE MARKET

These frames have an auto Bolt Stop that holds the bolt open after last shot.
The magazine is what operates the stop, weak magazine spring = weak bolt stop.

The magazine release is a Push Button on Left side of frame.

* Grips are removable on the later design.
* You can run a Mark 2 upper on this frame.
* You can NOT run a Mark 2 Bolt on this frame unless you remove or replace the LCI.
**
Do NOT run a Mark 1 Bolt or Upper on this frame unless you have properly modified it
(If you don't know how then DON'T DO IT and don't ask me how!).


* Trigger and lock work parts are interchangeable throughout Mark 1, 2 and 3 frames
with exception to the sear spring which is unique to 22/45 but MK2 and MK3 22/45 use same sear spring
* Mainsprings are the same on MK2 and MK3 22/45
* A Mark 2 magazine (90045) will work in the MK3  22/45 BUT you may need to de-spur your factory trigger
* The pivot pins (trigger, hammer, sear), Bolt and Magazine Releases and Safety in the MK3 22/45
Are unique to the MK3 and will not work in the MK2 22/45
Mark 2, 22/45 Frames





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The Mark 2  22/45 frame is the Ugly one of all the frames and not much for resale and is the first Polymer Mark frame.

These frames have an auto Bolt Stop that holds the bolt open after last shot.
The magazine is what operates the stop, weak magazine spring = weak bolt stop.

The magazine release is a Push Button on Left side of frame.

* There are no grips for this frame unless you do a LOT of work to it.
* You can run a Mark 3 upper on this frame.
* You can run a Mark 3 Bolt on this frame.
**
Do NOT run a Mark 1 Bolt OR Upper on this frame unless you have properly modified it
(If you don't know how then DON'T DO IT and don't ask me how!).


* Trigger and lock work parts are interchangeable throughout Mark 1, 2 and 3 frames
with exception to the sear spring which is unique to 22/45 but MK2 and MK3 22/45 use same sear spring
* Mainsprings are the same on MK2 and MK3 22/45
* A Mark 3 magazine (90229) will work in the MK2  22/45
* The pivot pins (trigger, hammer, sear) in the MK2 22/45 are unique to the MK2 and no longer available
* The Bolt and Magazine Releases and Safety in the MK2 22/45 are unique to the MK2 and no longer available
Mark 4 Frames





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Here we are speaking about the STEEL AND ALUMINUM traditional style frame.
There is a 22/45 Mark 4 frame, more about it later on this page


This is a pretty MAJOR rework of the old Mark pistol but still very much the same pistol

The single most notable change is the ONE BUTTON take-down that DRASTICALLY changed Field Strip on these.

They also added an Ambidextrous Safety

They now have a STEEL and an ALUMINUM frame
The steel is currently ONLY Stainless
The Aluminum is currently ONLY Black

These frames have an auto Bolt Stop that holds the bolt open after last shot.
The magazine is what operates the stop, weak magazine spring = weak bolt stop.

The magazine release is still a Push Button on Left side of frame.

* Grips are unique to this frame although MK3 grips could be modified to fit.
* Mark 4 frame is NOT compatible with ANY of the older uppers.
* You can run a Mark 2 or 3 Bolt on this frame.
* SO FAR all MK4 uppers are interchangeable with all MK4 frames

* Trigger and lock work parts are NOT  100% interchangeable with Mark 1, 2 and 3 frames without modification.
* Mainspring is built into the MK4 frame so the old mainsprings play no part here.
* You MUST have a Mark 3 (or 4) magazine (90231 same part # for both) for this frame
Mark 3 Frames





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Here we are speaking about the STEEL traditional style frame.
There are 22/45 Mark 3 frames, more about them later on this page


These frames have an auto Bolt Stop that holds the bolt open after last shot.
The magazine is what operates the stop, weak magazine spring = weak bolt stop.

The magazine release is now a Push Button on Left side of frame.

* Mark 2 grips will most likely need modifications to run on these frames to clear magazine button.
* You can run a Mark 2 upper on this frame.
* You can NOT run a Mark 2 Bolt on this frame unless you remove or replace the LCI.
**
Do NOT run a Mark 1 Bolt or Upper on this frame unless you have properly modified it
(If you don't know how then DON'T DO IT and don't ask me how!).


* Trigger and lock work parts are interchangeable throughout Mark 1, 2 and 3 frames
* Mainsprings are interchangeable throughout Mark 1, 2 and 3 frames NOT 22/45
* You MUST have a Mark 3 magazine (90231) for this frame
Mark 2 Frames








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Here we are speaking about the STEEL traditional style frame.
The 22/45 came about during the Mark 2 run, more about them later on this page

These frames have an auto Bolt Stop that holds the bolt open after last shot.
The magazine is what operates the stop, weak magazine spring = weak bolt stop.

The magazine release is on the Bottom Rear of frame same as previous frames.

* You can run Mark 3 grips on these frames with no alterations to the grip.
* You can run a Mark 3 upper on this frame.
* You can run a Mark 3 Bolt on this frame.
**
Do NOT run a Mark 1 Bolt OR Upper on this frame unless you have properly modified it
(If you don't know how then DON'T DO IT and don't ask me how!).


* Trigger and lock work parts are interchangeable throughout Mark 1, 2 and 3 frames
* Mainsprings are interchangeable throughout Mark 1, 2 and 3 frames NOT 22/45
* A Mark 3 magazine (90231) works in a Mark 1 frame but best to use 90046
Mark 1 or STANDARD Frames








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There are TWO versions A-54 and A-100, some may NOT be marked at all.

These frames have NO auto Bolt Stop, you manually apply the safety with bolt held back to hold bolt open.
These frames can NOT be modified to have auto Bolt Stop.

The magazine release is on the Bottom Rear of frame, my pictures show an after market (Volquartsen) magazine release.

To distinguish between the two frame types is EASY,,
LOOK at your magazine,
If the slider button on the magazine is on the RIGHT hand side of the pistol (when installed in pistol)
You have an Early or A-54 frame.
If it's on the LEFT side it's a later A-100 frame

There are currently no manufacturers of GRIPS for A-54 Frames,
You can find used ones on eBay and GunBroker and you may find some sellers making NEW wooden grips.
Today Nobody makes a rubber grip for A-54 BUT Pachmayer used to make them so there are used ones around

When using Mark 2 or Mark 3 grips on an A-100 frame you will need shims to hold the hammer pin in place
and possibly the sear pin as well. Hogue grips come with this shim.

* You can run a Mark 2 or Mark 3 upper on this frame but you STILL will not have auto bolt stop.
It would be BEST to keep your Mark 1 Bolt when doing so, if not you will need a MK2 or 3 safety.
Anytime you do stuff like this thoroughly TEST your safety before using live ammo!

* Trigger and lock work parts are interchangeable throughout Mark 1, 2 and 3 frames
* Mainsprings are interchangeable throughout Mark 1, 2 and 3 frames NOT 22/45
* A Mark 2 magazine (90046) works PERFECT in a Mark 1 frame
RUGER MARK SERIES
GRIP FRAMES
EVERYTHING you could possibly want to know,,,,
WHAT DO THEY WEIGH??
EVERYTHING you could possibly want to know,,,

In order lightest to heaviest, I'm missing the fixed grip MK3 22/45 in weights.
22/45 SERIES GRIP FRAMES
EVERYTHING you could possibly want to know,,,,

Ruger would LIKE you think this was to offer a 1911 style platform for the Mark pistol,,
BUT what really happened was the Buck Mark and they needed something to counter it.
If I'm missing anything, have something wrong
or you would like to see additional information,,
LET ME KNOW
Just click here or email LEE@LMEXCAVATING.COM
Or call 812-853-5007
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