The mag well and checkered mainspring housing are machined from solid bar stock steel.
This product can be used with or without the mag well attached, although there will be a small dovetail below (this does not impair function). The mag well fits nicely in quality frames. The machined checkering gives much better traction than models with cast checkering.
This is a great replacement for plastic mainspring housings on Kimber , Colt, and other full size or commander style model 1911s.