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Posted: 8/23/2017 7:46:29 PM EDT
I took my Tirant 9 apart for cleaning, and I had to replace the O-Rings.

On the 13.5 x 1 LH the are two internal spots for O-Rings, do I need two or just one?

If just one ring is needed which place is correct?

I'm running a Sig MK25
Link Posted: 8/23/2017 7:54:51 PM EDT
[#1]
Quoted:
I took my Tirant 9 apart for cleaning, and I had to replace the O-Rings.

On the 13.5 x 1 LH the are two internal spots for O-Rings, do I need two or just one?

If just one ring is needed which place is correct?

I'm running a Sig MK25
View Quote


AAC O-Ring Guide

If I remember correctly the O-Ring goes down in the piston at the bottom of the threads to index on the muzzle of the host barrel.
Link Posted: 8/24/2017 10:30:18 AM EDT
[#2]
Shoot me an e-mail and I'll send you a PDF of the piston shown in section revealing the proper o-ring placement.

Mike Smith/AAC
SilentMike

[email protected]
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