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The Impuls-IIA suppressor ships with a 1/2x28mm Impuls device. Specifications: Caliber 45 Auto; Material Aluminum; Finish Anodized; Length 7.8 inches; Diameter 1.4 inches; Thread Pattern 1/2 x 28; Weight 12 oz. Brand: B&T Firearms. Category: Suppressors. Model: Impulse IIA. Color: Black.
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