I got the 18 inch. I am going to test for accuracy Friday night with several different flavors of ammo.
For practice I am just going to run with Federal Bulk Pack.
I have tried it with four different triggers. Geissele, AR Gold, JP and GI. Runs like shit through a goose. I have a JARD in a lower somewhere, I will test it later.
I *do* know that with a can on, most timers still cant record the shots...