I was digging around looking at my G-spec on the weekend, mine to is a project in progress (it dose shoot now) I have looked at all my VSR and G-spec components, I have ordered several hop rubbers and a couple inner barrels.
from my best recollection all the VSR-10/G-spec hop rubbers are the same a well inner barrels have the cut out as a pistol barrel and the hop rubber dose retrofit most TM pistols.
I have an aftermarket hop chamber that requires an AEG type barrel and hop rubber, I will be tearing my G-spec down in the next couple weeks as it is second on my currant project list, I will be installing a new bull barrel and extra long inner using the stock G-spec hop unit, I will pass on any info I can as I receive it.
Cheers
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