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The inside black conductive coating on 21AXP's have what looks like a "window" strip at top of guns .25" x 1.5" (dark silver non transparent) - is this the getter ?
Where is getter on 15G's and what size is it ?
I look on later 21" color roundies and they only have conductive coating + 1" red band - and no getter ? (because they were more confident of seal ?)
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