New to me Reising, new to me firing pins

[MGMike]

3 hours ago, StrangeRanger said:

So do I understand correctly that you really don't like the Reising?

Very perceptive. You do get the drift.

M

 

[BillyDixon]

years ago i bought 4 reising m-50 s from a rural sheriff dept, around 1980 or so, these guns had been shot many thousands or rds, many times the officers would take them home so friends and family could play with them, , these guns had been never been cleaned or dissambled, filthy dirty and beat up, well suprise every one ran flawlessly ! and just kept running, worked with anything you fet them, steel ww2 ammo or new brass,  go figure, just sayn

[Frank I.]

The Reising I have now, I bought in 1990, I have broken NUMEROUS firing pins, two bolts, had an end cap break in two, and an ejector broke.

I have not fired it that much over the years, just about every time I took it out, something broke.  

I still like shooting it though...

 

[fartsalot]

If the firing pin is resolved I think a lot of out problems will be solved.

[StrangeRanger]

I shot my Reising for years with zero issues.  It's new owner broke an ejector, a firing pin and an extractor screw in the first two years

[BillyDixon]

i think reisings are pickey about who owns them,  just thinking

[fartsalot]

I keep mine very clean and I load for it and dropped the load down just enuf to run it.

[GUNGUY45]

I've had to replace the selector switch(it wouldn't run when I bought it, tried most everything. finally took the selector off, & it ran great in FA. New switch, & away we went!)

I also broke 1 firing pin, replaced with stock pin.

I had the action bar break.

I replaced the 1 piece bumper/spring guide with a 2 piece.

 

I've owned it since '94, I might have 2000 rounds through it in that time.

 

[Cort Tompkins]

I'm still testing firing pins, and have unfortunately started to break them again.  I was worried about the rear edge of the firing pin flat/stop starting to peen over so I made a few S7 pins and left them pretty hard (around 58 RC, I think).  They're clearly too brittle at this point. One broke during extended dry fire testing; it lasted for maybe 100 dry fires.  And I broke another extra hard pin this weekend while shooting.

It's all a bit disappointing but I'm going to keep doing more stress testing on both Fatigue-Proof and slightly softer S7 pins.  I suspect I was a bit too reactive about the very slight peening I saw on the softer pins.  More to come ...

[SteelSteed]

Posting on some random Reising threads to let everyone know Ieystone Arms has a new production run of 30-round mags is available.

https://keystonearms.com/product/keystone-reising-magazine-30-round/
 

 

[SteelSteed]

On 8/28/2025 at 11:59 AM, StrangeRanger said:

So do I understand correctly that you really don't like the Reising?

I’m definitely getting a feeling…… lol

All I can add is the trigger of the M55 I cleaned is terrible, but it is a lot more fun to shoot than the Thompson carbine I used to have. Very handy and smooth shooting otherwise. 

[Frank I.]

I took my Model 50 Reising out today, and once again it broke yet ANOTHER firing pin. The pin was a modified (inertia) Keystone titanium pin, this one lasted less than 500 rounds, which seems normal. The entire (reduced diameter pin) snapped off right at the base of the pin.

I have lost count of how many firing pins I have broken...a LOT 

I hope Mr. Cort Tompkins is still working toward a solution to this problem. 

[fartsalot]

When Keystone runs out of pins we will all have a safe queen that is not any good to shoot.       I have swapped my wolf pin spring for a oem spring and I load my ammo to a lesser power factor than a factory round.   Mine usually fail around 1000 rounds.   I'm trying out my new recipe to see if this helps.