if you're asking me, i'm afraid i'm not familiar with the models. i got a complete upper. i already had a lower with parts i preferred... namely trigger. i don't recall the differences in profiles or components. i just wanted a fluted and threaded barrel. mine's 18" but 16" would be fine with me. i think the guy named Graycard here is knowledgeable on the subject. you can pm him if he doesn't chime in.
yea.. i know. sometimes my shooting sux. they were hit, just not very well. killed 3 in the cotton but only recovered two. got all 5 from the pasture and 6 from the open field.
