Anyone ever "open up" the port on a Ruger Mk series?

Just a bit of absolutely useless knowledge. When Ruger makes those guns, they thread one end of a piece of heavy seamless tubular steel, then screw in the barrel with all the machining complete. Then they use an internal rod with a slot for the feed ramp to hold the assembly in place while they machine the ejection port, magazine hole, holes for the ejector, hammer and bolt stop, and cuts for the bolt ears. That is why Ruger considers the barrel and receiver (the tube) as a unit and won't normally sell barrels separately.

Jim
 
This could be a possibility: Your recoil spring assy. might be needing to be replaced. This is another part that's relatively cheap. Not saying this is the problem, but it could be.
 
Hello James K. Thank you for sharing that info. I wondered how they did this and why. Makes absolute perfect sense. I cant help but now wonder, how does the aftermarket accurately attach new barrels when they build race dragons from Mk series pistols?

Anyway, thank you for the information, I am sorry I veered of course of the original topic.....carry on......
 
I cant help but now wonder, how does the aftermarket accurately attach new barrels when they build race dragons from Mk series pistols?
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No different than replacing any other screw-on barrel on any other pistol or rifle.

The advantage of the manufacturing process that JamesK described is that Ruger eliminates the step of barrel indexing (aligning sights, feed ramps, etc, with the receiver), thereby saving some time/money. That's all taken care of in the fixturing since the reciever is machined after the barrel is attached.

After market barrels will have to be indexed just like any other screw-on barrel.
 
I hate Ruger MKII

The ruger MKII is super accurate, but reliable it it'nt at all. I have shot about 4 or 5 of them and they are so finicky. I have no idea why this pos is still made. Must be they sell, I wouldn't give $100 dollars for one, it's the worst gun ever made for it's intended purpose in any way.
 
This is a Smith & Wesson Model 41 that I made a trade for involving an extra Ruger Mark II Competition Target I had. The original owner of the Model 41 sent it back to Smith & Wesson THREE times, before this pistol started to operate the way it should.



Here is just a small sample of the Ruger Mark I, II III & 22/45 pistols that I have the current privilege of owning. Not one of these pistols has EVER been sent back to Ruger for any reason. Some of the factory triggers have been changed to a "steel" variety, sears have been either reworked or replace with a VC sear, but all of the below pictured pistol run flawlessly as do the other EIGHT Ruger Mark II's that didn't make this photo shoot.



So, from my extensive 45+ years of owning, shooting and working on these Ruger Mark pistols, I find it extremely hilarious to read that they are NOT reliable. I laughed until a little bit of pee came out. :p
 
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