Sig Guy, LLC is not responsible for damaged parts due to incorrect installation practices. We suggest that you consult a qualified gunsmith to install any of the products on this website. Disassembly of firearm, installation or removal of parts or accessories, reassembly of firearms, and testing should be performed in accordance with the firearms manufacturer’s instructions by certified gunsmiths only! Always check for proper fit and function before firing. Be sure to fire at least 100 rounds of commercial ammunition to verify reliablility before returning the firearm back to service.  NO INTERNATIONAL SHIPPING!