Chambering the first round, a slingshot modification

[skiflydive]

Just a little different thought...nobody ever talks about the "ceiling" of the spring cavity in the follower. To me...(a manufacturer of stuff) it would be fun to measure the heights of the internal dimensions of the cavity. If it has a lot of variability wouldn't that affect the pressure the spring applies front vs back of the follower. Variability in the angle of the last coil of the spring would do the same thing

[jocko]

also not sure this magaazine thing is AN EXACT SCIENCE EITHER.

[John222]

also not sure this magaazine thing is AN EXACT SCIENCE EITHER.

I think they just take a "similar to" approach. They find something similiar and scale it to fit.

Have to disagree with Tilos. As an engineer I can say that you have good engineers and you have lazy engineers. And this mag is a good example of a lazy engineering job. And yes, to redesign this plastic mag and go into production you would need a new injection mold. But to prototype one from nylon you only need a bandsaw and a file. Or I could go old school and make it from metal. Just 1/8" thick steel the width of the mag and 2 right angle bends for the guide legs.

[Tilos]

John222:
I'm not quite sure what you are disagreeing with, I never said anything about prototyping a new follower from nylon or metal.
And even after the prototype process and testing, a new mold($$$) still needs to be made.

I said modifying the existing follower design, as a typical gun owner, we can only REMOVE material.

I wouldn't say lazy engineers, but perhaps less talented, and many spend their careers tweeking someone elses break through patentable design (I have 2).

Cheers
Tilos

I'm done with this thread and give anyone else the last word

[jocko]

maybe u

I think they just take a "similar to" approach. They find something similiar and scale it to fit.

Have to disagree with Tilos. As an engineer I can say that you have good engineers and you have lazy engineers. And this mag is a good example of a lazy engineering job. And yes, to redesign this plastic mag and go into production you would need a new injection mold. But to prototype one from nylon you only need a bandsaw and a file. Or I could go old school and make it from metal. Just 1/8" thick steel the width of the mag and 2 right angle bends for the guide legs.

should just do this and prove to yourself it can be done with perfection. 98% of us are not engineers and there are many titles of engineers to, some who cannot make a peanut butter sandwich without reading te directions on the jar and some who can make a PC with their eyes closed. My son is a Rose Hulman mechancial engineer that I truly would not trust in building a PC, nor would he

U make a good one that works and eliminates all the supposed issues that kahr mags give, I can assure you, this forum will back u 100% with orders.

[John222]

I'll take a stab at it over the winter. It looks to me that the barrel side of the follower needs to be able to tilt up another 10 degrees when the mag is full. However, when the mag is full the follower is almost fully depressed, not leaving much room to work with.

[jimsea]

a follow up video shot today........

http://youtu.be/WYlA4BouR-g

[kahrnut1]

if you put the mag spring on 9 & 40 mags into the follower without tension the sping in one direction centers in the mag. if you swap ends with the spring it touches the back of the mag i have always put the springs in with the end that centers in mag against the folower. should they be the other way. is this a effort by kahr to change pressure on follower.

[John222]

a follow up video shot today........

http://youtu.be/WYlA4BouR-g

Nice!

[dean1818]

a follow up video shot today........

http://youtu.be/WYlA4BouR-g

Great comparison

[Rodenmg]

OK folks, here's how I did it (it's not a "how to do it", so proceed with caution and at your own risk if decide to attempt something similar)So for now, Greg

I just did this modification to one of the mags for my CW9 and It worked fantastic. I can now hand cycle the slide as slowly as I want and it will feed the first round with no nose-dive. And this is with hollow points. I plan to shoot it some before doing the rest of my mags just to be sure there are no negative side effects. For now I'm a very happy camper!

P.S. Makes me wonder why they don't come this way.

[LDM]

anyone ever tried Wolff 5% extra power mag springs?

I have made the modification to the ramp described in this post and believe it has helped function for my PM9.

Out of curiosity, has anyone tried the Wolff 5% extra power magazine springs?

Recently tried the Wolff extra power recoil spring, which if memory serves Jocko endorsed. Noticed immediately that my PM9 feeds with more "authority", for lack of a better word.

Between modifying the ramp and the extra power recoil spring, I think I am seeing better function all around.

[center_mass]

Just modified mine

I have 2 mags for my CM9 (one 6rd and one 7rd)....today I thought I'd give this a try. So far I only did it to one of them, until I can take it out and shoot to test everything.

So I started with the 7rd. I sanded it down to match the pictures in this thread, but it still didn't work....so, I swapped the followers by putting the "modified" follower into the 6 rd mag. That one worked pretty good! Still has a slight nose dive, but I was still able to ride the slide forward and chamber the round without any problem. May need to sand a little more.

Not sure why it works in the 6rd, but not in the 7rd...

[flccw45]

CM9 Racking Problem Solution

To all CM9 owners having racking the first round problem (most of us), like me, I have a solution for us all. I think I've cracked the code. Here's what you should do: disassemble 6-round magazine, hold magazine spring at each end, and slowly, streeeeeech it out a good 2-3 inches at each end, reassemble, try it out, and...wallahhh!!! Noticed also the 6th round when pushed down, it pops back up.

Alternate solution: If you have a 7-round magazine, take the spring off it and use it on the 6 rounder...caveat is you can only use 6 rounds.
Another possible solution (LDM had mentioned this on his post): Use 6-round Wolff spring that's 5% stronger than the stock spring. Haven't tried this yet.

Let me know if it works for you...it does to me.

[Dirt doc]

I picked up a new PM45 on Thursday and it jams about 2/3 of the time when I load the first round by releasing the slide stop. The base of the round gets caught under the stripper bar unless I position it 1/32 inch forward in the magazine. It loads 100% when I pull the slide back and sling shot it. Go figure. I'll see how it loads once I have the break in completed.

I shot it a little today but it was seven degrees and the wind was blowing. I only got 35 rounds through it. I just used the sling shot load at the range and it cycled perfectly. Warmer days are coming so we'll see if a couple hundred rounds changes anything.