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I think I need a flip up gas block front sight for my ZM4 (GTC). As it is the gas trap carbine, I can't use a PRI. I think it would need to have the equivalent height of a gas block sight on a SIR, but I'm not sure of that... Any ideas???
TIA,
TS
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There's been a drought in the Moroccan Rain Forest. WECSOG Certified Armorer
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