Great product. Guide rod spring was so stiff my normal medium reload target ammo would stove pipe. No problem with full house defense ammo. The allen wrench that comes with the kit could have a larger handle than 1/8 inch diameter. I drilled out a shaker peg and tapped the handle into it for better control and not to be lost so easy.

The sight works well and becomes part of the weapon which results in no added bulk or balance issues. The battery life is shorter than expected.