I think the success of the carbine will either doom aftermarket parts or launch them into a new high paced realm. Right now as a pistol its not mainstream enough. As sbr people are few and in between and even fewer that understand it is legal if done correctly. Now though an importable carbine rifle length barrel 922 compliant and legal major aftermarket companies will look at what they can do if it is imported in enough numbers. Time will tell, and that's good news on the trigger group thanks.