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A rare find and we have found a small lot of the original green colored HK .40 O-rings. Get them while you can as they are no longer made in green and are only offered while supplies last. The green o-rings were first used on the older HK pistols. Still made from the same material as the newer black o rings only in green.

A much needed spare and a much needed part for your HK barrel. This factory part is a high wear item as the oring provides the seal between the slide and the barrel, which provides a secure lockup & increased accuracy. The O-ring is the same for all 40 barrels and will fit all of the following HK pisols with the o-ring groove:

• HK USP .40 tactical barrel
• HK Elite, Expert other custom aftermarket .40 tactical style barrels