ar 15 barrel help

[athompson]

I have an ar15 I got used with very low round count less than a hundred rounds fired it's a smith and wesson m&p 15 OR or it was what's messed me up was that all the new ones Iv see we 1/9 twist mine is a 1/7 twist so I really looked at my barrel

good and the numbers on it are dd f mp 5.56 1/7 is this the factory barrel of is this a daniel defense barrel any help would be appreciated

 

[Wallace's]

Yes, Daniel Defense, Cold Hammer Forged, Magnetic Particle Inspected, 1-7 twist. 5.56 chamber.

 

[athompson]

Thanks for the input