This factory Heckler & Koch magazine catch spring is listed for the HK417 and MR556. It returns the magazine catch so the magazine locks into the lower. Confirm fit for your rifle before ordering. If you are not comfortable working on the internal parts of your firearm, have a qualified gunsmith handle the installation.
- Part: Magazine catch spring
- Listed fit: HK417 / MR556
- Brand: Heckler & Koch
- UPC: 642230251052
