I am not entirely sure why this is true, but my guess is that it is due to heavier firing pins
of the older designs.
Purge bench stock of the old firing pin
configuration and replace it with the new firing pin
, NSN 1015-01-546-6617, and threaded plug, NSN 5935-01-546-6679.
I also made a tool just like this for disassembling the Ruger Model 77 firing pin
I've found that some articles about Colt's firing pin
block are in error.
Also, check your firing pin
to be sure it's retracting enough to stop beneath the breach face.
com) offers plans for making the Model 20 firing pin
and a list of dealers who specialize in obsolete gun parts.
Excessive pitting on face of bolt and/ or elongated firing pin
Push in on the firing pin
with a small pin punch and release the firing pin
stop down out of its slot while restraining the firing pin
This would include the rear sight, the firing pin
lock, the firing pin
lock spring, the firing pin
retaining pin, and possibly the cartridge indicator pin and spring.
I grew up understanding two types of auto pistol firing pin
activation, an internal hammer and external hammer.
It also has a redundancy of the tiny springs and giblets most likely to disappear into the carpet or ground cover, to wit: (1) AR-15/M16 Extractor, (2) Extractor Springs, (2) Extractor Spring Inserts, (1) Disconnector, (1) Bolt Gas Rings (set of 3), (1) Extractor Pin, (1) Firing Pin
, (2) Firing Pin
Retaining Pins, (1) Bolt Cam Pin, (1) Hammer Spring, (1) Trigger Spring, (1) Ejector/Safety Detent Spring, (1) Magazine Catch Spring, (1) A1 Disconnector Spring (2).
The limit for the firing pin
assembly remains 15,000.