Extra Long .308 Ejection Port Door

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This ejection port door is manufactured to the original Costa Mesa ArmaLite AR-10 port door overall length and is compatible with SR-25 carbines and SR-25 Cartel Uppers. This ejection port length allows more reliable ejection of cases fired from 16" suppressed .308 uppers. 

Note: This door is not the same height as the Costa Mesa ArmaLite door which was taller. The only known compatibility for this part are the above mentioned uppers. These are referred to as "Extra Long" .308 port doors and do not fit LMT rifles. 


What's Included

  • .308 Ejection Port Door with Integral Short Pin (Original Costa Mesa ArmaLite Dimensions)
  • .308 Ejection Port Door Rod with Spring
  • .308 Ejection Cover Spring
0.7 oz

1 Review

  • 5
    SR25 Dust Cover

    Published by Mike Bray on 16th Jul 2024

    Thank you for delivery of a part I've needed for quite a while! Everyone and their bird dog has been needing these covers, I'm glad Griffin stepped up to help us out!