they are unreliable....and very difficult to set up, and get working properly.
these days, i wouldn't buy one on a bet.
before you start, get a spare magazine tube from Gunparts in case yours wont work, and you want to restore the gun to working condition
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Flectere si nequeo Superos, Acheronta movebo."
—Virgil
"Tact is for people not witty enough to use sarcasm"