AR15.Com Archives
 Purpose of the plunger tube and spring?
kyreb  [Team Member]
8/21/2007 2:23:38 PM
OK....educate me. I was replacing a broken extractor on a P-16-40 Limited for a friend yesterday. ( Para metallurgy strikes again!)

Other than making removal of the extractor and firing pin a royal PITA....just what does that little thingy really accomplish? Seems like a solution in search of a problem. My P-16-40 does not have this thing.

Took three hands to reassemble. I had to get the wife over to help get it all back together.

Lord, how I miss the 70 series.
derf42  [Member]
8/21/2007 4:18:37 PM
LET ME SEE, YOU WERE REMOVING A BROKEN EXTRACTOR THAT IS LOCATED IN THE SLIDE.SLIP THE SLIDE OFF PUSH THE FIRING PIN FOWARD SLIDE THE FIRING STOP OFF REMOVE THE BROKEN EXTRACTOR, CLEAN THE HOLE REVERSE THE PROCEDURE. DONE. PUT THE SLIDE BACK ON. SO WHAT THE HEY DOES THAT HAVE TO DO WITH THE MAINSPRING HOUSING LOCATED IN THE FRAME? THE 70SERIES HAS ONE TOO. WHY TAKE IT APART UNLESS YOU HAVE RUN 100K ROUNDS THROUGH THE GUN AND YOU THINK THE SPRING IS EXHAUSTED. ITS A B---- TO GET BACK TOGETHER NEXT TIME USE A VICE TO HOLD IT IN PLACE WEARE EYE PROTECTION USE A PUNCH TO DEPRESS THE PLUNGER, SLIDE THE RETAINER LOCKING PIN IN. DERF
kyreb  [Team Member]
8/21/2007 5:09:35 PM
Let me see....You know where to find the caps lock button? No need to shout ya' know.

The spring and plunger in question is in the slide holding the firing pin and extractor in place. It has nothing to do with the mainspring housing.

Also, maybe you should consider turning down the smartass attitude a little until you have been around here awhile.
Dano523  [Team Member]
8/23/2007 3:07:31 AM
The part in question is the Firing pin block slide plunger and spring.

Para now uses the Colt 80 series firing pin block system, which is the two cam levers on the ejection side of the frame and the plunger and spring on the slide.

The bottom frame cam works off the back of the trigger shoe, which pushes up the upper fame cam to press the slide FP block plunger into the slide when the trigger is pulled back, which allows the FP to move forward and strike the primer.

The downfall to the 80 series system is it requires a lot of trigger take-up to allow the system to work (read lots of creep).
kyreb  [Team Member]
8/23/2007 11:33:30 AM
Thanks! Looks like another case of the gun industry bowing to lawyers again.