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Keep the motor disc on Magpul grip?


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#1 Heathrow

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Posted 29 July 2013 - 05:48 PM

When swapping the standard grip out for a Magpul PTS Moe grip, do I keep the little circular metal disc at the bottom of the motor? It almost seems like too tight a fit to keep it in there.

Also.. What is the use of the little spacer/disc in the first place?

Thanks for your answer!

#2 gcw360

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Posted 29 July 2013 - 06:07 PM

View PostHeathrow, on 29 July 2013 - 05:48 PM, said:

When swapping the standard grip out for a Magpul PTS Moe grip, do I keep the little circular metal disc at the bottom of the motor? It almost seems like too tight a fit to keep it in there.

Also.. What is the use of the little spacer/disc in the first place?

Thanks for your answer!
It's not needed.  The original purpose of the motor spacer was twofold:
  • It allowed motor adjustment with older type motor plates which had only a grub screw.  Imagine what would happen if the grub screw made contact with the motor shaft?  It would cause all sorts of wear issues.  Having the motor spacer in between the screw and the motor eliminates the issue protecting the motor shaft
  • Heat dissipation - Most new motor grip end plates, like KWA's, have a wide screw that engages the endbell of the motor properly.  And, they are either vented (like the Magpul) or have heat-sink fins to help with heat dissipation.
While it's fine to keep the spacer, if you toss it it's no biggie either.

Hope this helps.

#3 Heathrow

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Posted 29 July 2013 - 06:59 PM

Thanks again for your swift reply.




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