BASTION Laser Engraved Aluminum Rear Cover Back Plate for FNH FNS 9mm or .40 - We The People Text Fits FNH FNS 9mm .40 caliber Replaces factory part with durable aluminum custom slide plate Made from black-anodized, hard-coat 6061 T6 aircraft billet aluminum Laser engraving will not rub off; not painted, not a sticker Permanent laser engraving