This Mainspring Housing Cap from EGW (EGW part no. 10180) is machined from titanium and fits both the full-size 1911 Government frame and the compact Commander frame. The cap sits at the bottom rear of the grip frame, retaining the mainspring and its housing pin, and forms part of the rear grip surface the shooter’s hand contacts.

Key Specifications

• Functions as the mainspring housing cap, retaining the mainspring and its housing pin at the base of the grip.
• Machined from titanium for reduced weight versus a steel cap.
• Fits the full-size 1911 Government frame.
• Also fits the compact 1911 Commander frame.
• Sold as a single small part, not a complete pistol — it’s classified as a firearm accessory (is_firearm: no), so no FFL transfer is required to buy it.

Frequently Asked Questions

What does the mainspring housing cap do? It sits at the bottom rear of the grip frame, retaining the mainspring and its housing pin.

Will this fit my 1911? Yes, it’s sized to fit both the full-size Government frame and the compact Commander frame.

Buy the 1911 Government/Commander Titanium Mainspring Cap

Add this Government/Commander Titanium Mainspring Cap to your 1911 build or repair. It ships fast from our Lubbock, Texas gun shop, and our 1911 parts selection has more EGW 1911 parts.