My Custom S357 Sig Project

Heres a bunch of progress pictures and after pictures I took of my custom Steyr. Sorry the pictures aren't great, they're from my crappy phone camera. It started as a project gun but quickly became my favorite gun to carry/shoot. The frame modifications now make this grip fit like a glove for me and the .357 Sig barrel is insanely accurate / fun to shoot! The pistol started as a M40-A1. I installed a BT steel guide rod and BT delrin bushings which were both great upgrades IMO. Shortly after I swapped the barrel to .357 Sig after scoring one from another Steyrclub member.

I didn't like how the butt of the gun printed so I chopped the grip and reshaped it to the "S" frame size. It now accepts S40 magazines.


Then I ground down the serrations and indents on the backstrap.



Next I undercut and polished the trigger guard.


After the undercut, my grip was much higher and the finger groove didn't fit right so I removed it also.


Next I contoured the edges of the grip from square to more round corners. I felt this was a drastic improvement for the grip. Then I ground all the texturing of the sides of the grip because I planned on stippling later. I removed the "Mannlicher" on the bottom but left the small Steyr logo next to it. I then polished the entire grip smooth.