Umarex SD4 Silencer

The versatile long gun silencer SD4 is suitable for air guns with a caliber of up to 6.35 mm (.25). Especially at higher energies, the SD4 achieves a high sound-dampening effect thanks to its 6-chamber design and a precisely CNC-machined aluminum housing, reducing the noise level by 25 dB. However, a noticeable difference is also perceptible when used in combination with air guns in the calibers of 4.5 mm (.177) and 5.5 mm (.22). To maximize compatibility, the Umarex SD4 is delivered with two thread adapters (14 mm left and ½"-20 UNF).