The 3 most important upgrades all in one set with a discount. 

AAP01 Stainless Steel Hammer Set

Highlighted features

Precision CNC machined Stainless Steel

MAF Polishing Technology for greatly smoother operation

Durable construction prevents warping under hard use

Hammer set including hammer, sear, firing pin, rotor

SS G18c Auto Sear

Highlighted features
Precision CNC machined Stainless Steel
MAF Polishing Technology for greatly smoother operation
Durable construction prevents warping under hard use
SS G18c Auto Sear including SS G18c Auto Sear Spring
For TM & Umarex G18c

SS G Fire Pin Lock

Highlighted features

Precision CNC machined Stainless Steel

MAF Polishing Technology for greatly smoother operation

Durable construction prevents warping under hard use

Fire Pin Lock including Fire Pin Lock Spring