Quoted:
How well do you guys who are using this block like it? Ups? Downs? S.O.
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Does exactly what is supposed to do.... hold plain old Uzi mag in position for feeding of Colt patterm 9mm system.
Be advised, as posted in another thread-reply, it is cut from the factory to use the "mil-contract" mags, those that have the folded seam down the rear of the mag body... Commercial IMI will not fit, as you need to open the rear corner radius inside the block, refer to the Hy-Tech fitting thread tacked at top of page.
Only negative is the Uzi mag release is backwards...