Extractor Spring???

[1911SHOOTER]

     Has anybody else noticed the little green piece of rubber under rear of the Extractor
on the breech block of  the R51?   Remove the Magazine  shine a light in the
magazine slot and look at the bottom of the breech block.  You will see a little
green object. 
     Believe it or not, it is the elastomeric  extractor spring!!!
I have never owned or seen a firearm that uses rubber for a critical spring.
I wonder how long this will last?  Mine is already starting to ooze out! 
Is it something that the oil and Hoppe's will deteriorate?
Going to send an email to Remington and see if they will discuss it.
After all the problems we at R51pistol.com have had, and mostly fixed on our own,
now a cheap piece of rubber is behind one of the
most crucial parts of the firearm?
Blackie
BTW, just sent a query to Remington, let's see what they say.

[Texas-Mark]

     I have never owned or seen a firearm that uses rubber for a critical spring.

FWIW, the Desert Eagle .50AE uses a polymer extractor spring. I believe some other guns do too.

[GONRA]

GONRA remembers that the 35mm Oerlikon high speed antiaircraft cannon
used/uses a huge "hard rubber appearing" extractor spring.

[GunFrogg]

Yup I noticed the little green pillow spring. I distinctly remember when I saw it my brain said "Okay, lets not use bronze brushes or any none gun cleaning solvents on this".

The DPMS LR-308 rifle uses an elastomer extractor spring.

The use of elastomer springs in industry is very common, and offers some advantages over metal coil springs. One advantage is you can get more energy storage in a smaller area then a metal spring, which I would guess is the main reason for it showing up in the R51. But . . . . I'm guessing on this.

Okay there's my 2 cents :-)