This is a complete factory Heckler & Koch catch assembly for the HK416 and MR556. The listing does not say which catch it is, so confirm the part against your parts diagram before ordering. If you are not comfortable working on the internal parts of your firearm, have a qualified gunsmith handle the installation.
- Part: Catch, complete
- Fits: HK416 / MR556
- Brand: Heckler & Koch
- UPC: 642230249455
