This is a complete assembly, with firing pin and extractor installed, and ready to go into your pistol caliber carbine build. 
• One piece design for superb reliability 
• Machined from a single piece of premium 8620H steel alloy 
• Finished with a deep-penetration salt bath nitride 
• Works with forward charging models
• “Ramped” to accommodate both standard GI and dedicated 9mm hammers. 
• Manufactured in state-of-the-art facility with ISO:9001 & AS:9100 quality certifications