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Umarex Notos O ring List- Lets put them ALL here

Mark,

Yes, I saw the front site location. I haven't looked at the pic rail yet to see how it's attached though.

Yes, the barrel orings are a mess, I am looking to find suitable replacents for us all.
pic rail is all one piece and part of the shroud.. only separate items are the barrel, shroud tube and a rear not threaded bushing
 
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I installed the 1mm CS x 10mm ID rings yesterday. They were tight enough I needed to lightly hammer the barrel in with a 2x4 piece..
I thought hey that's gotta be good-make a seal.

Here are results with FX Atomics

Full pressure
1 complete HS turn in from all the way out (I think 1st shot low b/c I had silicone grease everywhere lol)

730.5, 739.1, 740.9, 739.1, 741.8, 744.4, 741.8, 740, 743.6, 742.7, 745.3, 743.6, 743.6, 744.4, 748.9, 750.7, 745.3, 743.6, 748, 742.7, 747.1, 750.7, 749.8, 740.9

End ~2,400 psi left (took 24 shots, obviously could shoot more to my 1.9k reg dropoff but it was 2 CARM mags and the last of my tin)
Ave FPS 743.6875
Ave FPE 19.53

It was more than before I installed the plenum kit by 5 FPS but it's making me wonder if I should also try to replace the inner o ring (one bolt goes through).

I have enough extras that I may try it out but in the meantime I did order these that @billhill got from Ali. I did 55 sets which got me >$20 so I got $3 off coupon. I think it means I'm getting 550 0.8mmx10.2mm rings coming on a slow boat.

Just ridiculous we can't have standard sizes... makes me want a lathe to widen the o ring slots in the OD of the barrel so we can use 1mm CS x 10mm or 10.5mm rings.

Where are people at for shot count? I just passed 1,000 pellets. Wondering if that makes my spring broken in and it is a normal amount of gain for plenum. I need to play with it to see where 97% of max FPS will get me with what HS setting so it is more efficient.

Also, sorry haven't gotten the dB meter out recently, I've been busy. But I did get a non tapered Buck Rail to test out.
 
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