New, aftermarket steel SEAL RING for the Mossberg 930 and 935 shotguns.  This simply slips over the top of mag tube and sits on top of the Piston Assy.....with the beveled end facing upwards (towards the muzzle end)

They are standard steel, not stainless, so cleaning is recommended just like it is with the Piston Assy.  I have installed on many guns with zero issues.

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Mossberg 930/935 Seal Ring

  • Product Code: Mossberg 930/935 Seal Ring
  • Availability: In Stock
  • Shipping: $0.00
  • $19.99