Gas block is at the pistol position. Apparently there are two pistol gas tube lengths ... 6.7" and 7.5" The tp555 gas block needs a 6.7" block. Even than one has to remove 7/8 or an inch of the distal end (end going into the block).
I bought my first tube from Del-Ton as it was the only place I could find one listed as in stock. tp555 suggested I try M1S as a source. (I had not thought to look there.)
So I've ordered one from them ... hope it gets in soon!
Mike
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