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Mfg Item #: 50970172
The HK thread protector is a must have accessory when a sound suppressor or muzzle attachment is not in use on your tactical pistol. The thread protector will prevent damages to the threads and crown. - Thread pitch 16x1mm left hand - Fits: - USP45 Tactical - USP45 Compact Tactical - HK45 Tactical. - Does NOT fit Mark 23.