Plastic, checkered arched mainspring housing?

[Fordzilla]

Does anyone make one?

[John]

Para Ordnance. Go to Brownells, part # 199-000-047.

[Fordzilla]

Thanks; I looked it up on Brownells, and it only indicates, "mainspring housing, arched."
Are you certain that its plastic?

[John]

At that price what you expected it to be? Steel?