[maddmatter1970]

I don't know about everyone else, but I can and have often been described as slower!

 

[JohnR]

 

[BigPapa53]

 

[Rich J]

I decided to have another go at mounting my 407k this morning.

Started by measuring the depth of indented locating holes in the 407k body at 0.032”. This corresponds with the drawing per Holosun of 0.9 mm / 0.036”, more or less. Measured original height of Ruger dowel pin head at 0.063”. So clearly I needed to shorten them in order to fit my 407k.

Proceeded to file on Ruger dowel pins. Took about 15 minutes each on my Grobet #4 Swiss pattern file. I held the dowel pin with a hemostat, finishing the head with sandpaper. I dry fit the shortened dowel pins, and kept going until the surface of dowel pin bottom was flat with the slide by eye. Approximate height of the new shortened dowel pin heads was 0.033” (was 0.063”, so I took off maybe 0.040”).

Tools used to shorten dowel pins. One pin is done, other remains.


I then checked the depths of the M4 female threads on RXM slide. The M4 screws supplied by Holosun extend 0.194 or 4.97 mm below the optic body, so clearly I had to shorten one to avoid fouling the EDP.

I then ground down the EDP side M4 screw using the small sanding head on my rotary tool, till the depth of the threads below optic body reached 3.82 mm / 0.150”. Since the max allowed depth from slide surface to top of EDP was 4.29 mm / 0.169, this should give approx 0.47 mm / 0.019” clearance to EDP.

Showing shortened dowel pins in slide. M4 screw shortening in progress. Yes, I used a toothpick to check clearance on the EDP side.


Performed dry install. Optic is flat on slide, with no air gaps. The shortened dowel pins provide positive optic to slide location. The M4 screws fill the optic mounting holes more securely. Snugged screws. Checked free play of Extractor with dry optic. Good, no contact with EDP.

Dry fit optic. No air gaps. Free play of extractor claw is good.


Torqued M4 screws to 15 in lb. Checked Extractor claw for movement, got same as before i.e. should be ok. 407K is now mounted. I like the alignment with the slide, very little overhang of optic body.

Will head to the range this week to zero.

 

[FLH2012]

Does anyone know of a direct mount RD with out needing mods to the weapon?

 

[PilatusTurbo]

I decided to have another go at mounting my 407k this morning.

Started by measuring the depth of indented locating holes in the 407k body at 0.032”. This corresponds with the drawing per Holosun of 0.9 mm / 0.036”, more or less. Measured original height of Ruger dowel pin head at 0.063”. So clearly I needed to shorten them in order to fit my 407k.

Proceeded to file on Ruger dowel pins. Took about 15 minutes each on my Grobet #4 Swiss pattern file. I held the dowel pin with a hemostat, finishing the head with sandpaper. I dry fit the shortened dowel pins, and kept going until the surface of dowel pin bottom was flat with the slide by eye. Approximate height of the new shortened dowel pin heads was 0.033” (was 0.063”, so I took off maybe 0.040”).
View attachment 249008
Tools used to shorten dowel pins. One pin is done, other remains.


I then checked the depths of the M4 female threads on RXM slide. The M4 screws supplied by Holosun extend 0.194 or 4.97 mm below the optic body, so clearly I had to shorten one to avoid fouling the EDP.

I then ground down the EDP side M4 screw using the small sanding head on my rotary tool, till the depth of the threads below optic body reached 3.82 mm / 0.150”. Since the max allowed depth from slide surface to top of EDP was 4.29 mm / 0.169, this should give approx 0.47 mm / 0.019” clearance to EDP.
View attachment 249009
Showing shortened dowel pins in slide. M4 screw shortening in progress. Yes, I used a toothpick to check clearance on the EDP side.


Performed dry install. Optic is flat on slide, with no air gaps. The shortened dowel pins provide positive optic to slide location. The M4 screws fill the optic mounting holes more securely. Snugged screws. Checked free play of Extractor with dry optic. Good, no contact with EDP.
View attachment 249010
Dry fit optic. No air gaps. Free play of extractor claw is good.


Torqued M4 screws to 15 in lb. Checked Extractor claw for movement, got same as before i.e. should be ok. 407K is now mounted. I like the alignment with the slide, very little overhang of optic body.

Will head to the range this week to zero.

Looks like you got it! I've had to do similar to get a K model onto a Glock 48. Hated doing it to the frame, but meh, many have apparently done it.

My 507C did fit directly, pins were perfect, no modding needed. I don't like the fact that the K models use a modified RMSc footprint, making this stuff a lot more difficult, unless the gun is specifically cut for that modified footprint. Kudos to Ruger on the Max 9, as a K model drops right onto that sucker perfectly.

I really enjoy the detailed write up, and keep us updated with a good range rep!

 

[PilatusTurbo]

Does anyone know of a direct mount RD with out needing mods to the weapon?

My 507C dropped right onto it. It's designed to directly mount RMR, DPP, and RMSc, but Holosun in its infinite wisdom made the K models with a "modified" RMSc footprint. K models are like RMSc but with no rear recoil lugs, and the front lugs have to be substantially shorter...

 

[Rich J]

Does anyone know of a direct mount RD with out needing mods to the weapon?

Any optic which is built to comply with the RMSc footprint should direct mount to an RXM. These include:

Canik M01
Sig Romeo Zero
Sig Romeo Zero Elite
Sig Romeo X Compact
Jpoint
Shield RMSc
Swampfox Sentinel
Springfield Armory Hex Wasp
Vortex Defender CCW
Vector Optics Frenzy

Holosun makes their own standard, called the "k series". This includes the 407k and 507k. It is not fully compatible with the RMSc. Holosun does not leave you rear mounting indentations, and the front mounting indentations are shorter than the standard. This is the problem I ran into with trying to mount my K series. I had to shorten the Ruger dowel pins. If Ruger offered a set of shorter dowel pins, that would solve the problem. I could have also bought an adapter plate, but I had the file out this morning, sooo...

Next up is the the Holosun EPS. Holosun provides an adapter plate to go from RMSc to K series for this series of optics. (If you have a P365 optic ready slide, an EPS will direct mount, since Sig uses raised bosses on the M3 mounting holes, and does not provide locating bosses.)

Then there's RMR. Any optic to the RMR footprint should also work. These include:

Trijicon RCS
Trijicon RMR
Trijicon RMR HD
Trijicon SRO
Holosun 407c
Holosun 507c
Holosun 507 Comp
Holosun 508t
Holosun 509
Holosun 510
Ameriglo Haven
Swampfox Liberty/Justice

Finally, DPP optics should also work.


Details are in the RXM User Manual on optic mounting.

You can get an idea of the range of optic mounting standards by skimming through the information here:

MRDS Quick Reference Cards

I've been compiling this stuff the last five years or so, and finally built a web site to park it all at.

 

[kazgorat]

Too late. They have been cloning for a while now. Probably the most famous (or infamous) is the LCP, which was a clone of a Kel Tec gun.

 

[meistermash]

Mehh I am going to stipple out the crap on both sides of the dust cover.
I am also the guy that cuts out the no obla and unnecessary parts of a manual.
And or magic marker the sections where I can lazily do so.

 

[PilatusTurbo]

Too late. They have been cloning for a while now. Probably the most famous (or infamous) is the LCP, which was a clone of a Kel Tec gun.

Yeah, it was a copy of a Kel-tec. Kel-tecs are largely trash. Ruger took it and made it a successful gun. P365 could be called a copy of the P11, and again, same applies. Don't get all mad at me for calling Kel-tec what it is. I don't really care if you get mad at facts

 

[Sr40ken]

I’m not sure any of the American gun makers are at the top of their game right now. Ruger can’t finish a revolver worth a darn, including under sized throats let alone have a consistent radius inside the frames. Of the last six guns I’ve purchased two Austrian and one Italian actual had great fit and finish.

 

[JohnR]

Quality, price, availability - you can only have two of the three.

 

[PilatusTurbo]

I’m not sure any of the American gun makers are at the top of their game right now. Ruger can’t finish a revolver worth a darn, including under sized throats let alone have a consistent radius inside the frames. Of the last six guns I’ve purchased two Austrian and one Italian actual had great fit and finish.

My SP101 I bought a few months ago is solid. I always take those apart and look them over new or used, since I love working on Ruger wheelguns. LCP 22 wasn't bad, and RXM is good. LCP did get a new firing pin courtesy of Ruger. Not sure it was needed, but they sent it free of charge, after offering to pay shipping both ways for a trip back.

However... You're correct. They've had their issues, I hear smith wheelguns just ain't what they used to be and their QC is also rough. Mossberg can't keep up with parts availability... So yeah.

 

[Sr40ken]

The wife kept her SP as operation is solid and throats mic good. But the finish is crap. Front crane lock pin ground off, front sight pin flush on one side sunk the other. The frame has grind marks below the cylinder they ground the frame line into the barrel. For a retail $1000 gun this is horrid. If I buy anymore Ruger’s I’ll have my dealer order them and if there are issues they can handle it.

 

[PilatusTurbo]

The wife kept her SP as operation is solid and throats mic good. But the finish is crap. Front crane lock pin ground off, front sight pin flush on one side sunk the other. The frame has grind marks below the cylinder they ground the frame line into the barrel. For a retail $1000 gun this is horrid. If I buy anymore Ruger’s I’ll have my dealer order them and if there are issues they can handle it. View attachment 249053 View attachment 249054 View attachment 249055 View attachment 249056

Yeah, no kidding! Mine was under $700 out the door, and it's a 3 inch stainless. Bass Pro was doing some Ruger deal, so it was an auto 10% off for Bass Pro members.

 

[Czed]

Hi guys first post here I've been a ruger guy since the 70s rifles mostly then
I remember when their p85 was introduced
Wal-Mart sold them back then i bought one then later the sexier p89 lol when it came out
Later i had p90,p91 and the p94 and a p95
The sr9c was the last ruger center-fire pistol I'd bought
Since this week when the rxm was introduced
I was surprised it was only 360.00 on sale no sales tax on firearms here in wv.
Having owned gen2 gen3 and gen4 glocks over the decades.
I shot idpa running cz75s and 1911s mostly.
And never really liking the ergonomics or triggers of glocks.
The rxm fit me personally so i bought a couple
One for an optic one without
The triggers are better than any glock trigger I've had without work and the iron sight with night sight's suit me just fine.
Hopefully different capacity grip modules will be released soon.

I already have a variety of mags and a cheap allegedly match grade barrel from year's ago
But the rxms seem more accurate than my glocks in just plate rack shooting.
The gunstore said they were the fastest selling pistol since they were released.

 

[Rich J]

Performed dry install. Optic is flat on slide, with no air gaps.

Just a quick follow up note for anyone who might find this useful: Looking side-on at the optic to slide interface this morning, I was able to see a very slight air gap, higher at the front, between the slide and the optic. I could also see both pins as well. Hmm.

I removed the optic and the shortened dowel pins, and put the optic back on the slide. No air gap. So clearly I had mis-measured the height of the pin by just looking at the head. What I should have done was measure the height of the pin, installed, ABOVE THE SLIDE. It's also possible the filing I did on the heads was not exactly square, and the top surface might have been angled such that my caliper was not on the highest point.

At any rate, I took an additional 20 or so strokes of the file to both pins. The result was the pins were a little shorter, but still provide a locating surface for the optic.

After that additional fitting, the optic sat on the dowel pins with no air gap. I reinstalled the M4 screws and torqued to spec.

 

[PilatusTurbo]

Just a quick follow up note for anyone who might find this useful: Looking side-on at the optic to slide interface this morning, I was able to see a very slight air gap, higher at the front, between the slide and the optic. I could also see both pins as well. Hmm.

I removed the optic and the shortened dowel pins, and put the optic back on the slide. No air gap. So clearly I had mis-measured the height of the pin by just looking at the head. What I should have done was measure the height of the pin, installed, ABOVE THE SLIDE. It's also possible the filing I did on the heads was not exactly square, and the top surface might have been angled such that my caliper was not on the highest point.

At any rate, I took an additional 20 or so strokes of the file to both pins. The result was the pins were a little shorter, but still provide a locating surface for the optic.
View attachment 249107


After that additional fitting, the optic sat on the dowel pins with no air gap. I reinstalled the M4 screws and torqued to spec.

This is precisely what happened when I conditioned and fitted my G48 slide for a 407K. Air gap, and had to remove even more material from the front lugs than I already had. Fit perfectly after that. Like I said, Holosun's modified RMSc footprint for the K models was kinda stupid, I'm sorry, but it was. Should've done what literally everyone else using an RMSc footprint did, and just used the RMSc footprint. Very nice, BTW

Hi guys first post here I've been a ruger guy since the 70s rifles mostly then
I remember when their p85 was introduced
Wal-Mart sold them back then i bought one then later the sexier p89 lol when it came out
Later i had p90,p91 and the p94 and a p95
The sr9c was the last ruger center-fire pistol I'd bought
Since this week when the rxm was introduced
I was surprised it was only 360.00 on sale no sales tax on firearms here in wv.
Having owned gen2 gen3 and gen4 glocks over the decades.
I shot idpa running cz75s and 1911s mostly.
And never really liking the ergonomics or triggers of glocks.
The rxm fit me personally so i bought a couple
One for an optic one without
The triggers are better than any glock trigger I've had without work and the iron sight with night sight's suit me just fine.
Hopefully different capacity grip modules will be released soon.
View attachment 249088
View attachment 249090
View attachment 249089
I already have a variety of mags and a cheap allegedly match grade barrel from year's ago
But the rxms seem more accurate than my glocks in just plate rack shooting.
The gunstore said they were the fastest selling pistol since they were released.

Quite glad to hear you're enjoying it already, and that they said it's moving well. I think Ruger's onto something big, here. I've not been shooting as much as you, but I ran a thousand through my RXM in just 3 range trips, and I haven't shot that much in a couple years. That's how fun this thing is to shoot. Mine got hot on those range trips, cooled, got hot again. Dirty, clean, JHP or ball ammo, mine has been 100% reliable, with Glock mags. The PMAGs did present very very minor issues, but oh well.

Just got my P89 converted to P89DC, and it can run the standard safety slide still, too. Never thought I'd like those older P series, but the P95 and P89 are my favorites, and I'm glad to own one of each. P89 is a shooter, and it's smooooooth.

 

[Czed]

This is precisely what happened when I conditioned and fitted my G48 slide for a 407K. Air gap, and had to remove even more material from the front lugs than I already had. Fit perfectly after that. Like I said, Holosun's modified RMSc footprint for the K models was kinda stupid, I'm sorry, but it was. Should've done what literally everyone else using an RMSc footprint did, and just used the RMSc footprint. Very nice, BTW


Quite glad to hear you're enjoying it already, and that they said it's moving well. I think Ruger's onto something big, here. I've not been shooting as much as you, but I ran a thousand through my RXM in just 3 range trips, and I haven't shot that much in a couple years. That's how fun this thing is to shoot. Mine got hot on those range trips, cooled, got hot again. Dirty, clean, JHP or ball ammo, mine has been 100% reliable, with Glock mags. The PMAGs did present very very minor issues, but oh well.

Just got my P89 converted to P89DC, and it can run the standard safety slide still, too. Never thought I'd like those older P series, but the P95 and P89 are my favorites, and I'm glad to own one of each. P89 is a shooter, and it's smooooooth.

I saw on gundeals it's available for 357.00 or so before ffl and shipping
They are already 360.00 here instore.
So when it reaches near 300.00 that's
When it'll really outpace common offerings like the sw sd9,springfield xd,canik,taurus and literally hundreds of turkish pistols and probably rugers own other offerings
I think ruger made a good all around pistol that will fill many roles and
At a price most can afford.