The 638 (like all of the shrouded hammer models) requires some thought in holster selection. These revolvers do not permit typical retention devices (thumb-break, strap, etc) that usually are placed over the hammer area.

Security of the weapon should be on your priority list. For this model, probably the best means of providing for weapon retention is a very well-fitted holster that will grip the weapon snugly.

Best regards.

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