All of the parts included in their lower parts kits are investment cast or otherwise machined to Mil-Spec drawings, materials and heat treat. Springs are a combination of 17-4 SST and various Mil-Spec steel wire are used in all of their springs with certification.
LR-01 Buffer Retainer 1-ea.
LR-02 Buffer Retainer Spring 1-ea.
LR-08 Selector/Safety 1-ea.
LR-09 Bolt Catch Spring 1-ea.
LR-10 Bolt Catch Buffer (Plunger) 1-ea.
308-LR-11 Bolt Catch 1-ea.
308-LR-12 Bolt Catch Screw 1-ea.
LR-13 Magazine catch 1-ea.
LR-14 Detent Spring 2-ea.
LR-15 Takedown Detent 2-ea.
LR-16 Mag Catch/Buttstock Plunger Spring 1-ea.
LR-17 Magazine Catch Button, Aluminum 1-ea.
308-LR-18 Front Pivot Pin 1-ea.
LR-26 Selector/Ejector Spring 1-ea.
LR-27 Detent (Selector) 1-ea.
LR-28 Hammer/Trigger pin 2-ea.
308-LR-30 Pin, Rear Takedown 1-ea