i would like to replace the std front sight that came with my 16" patrolman's carbine (bought new in feb of 2003) with the BMAS Front Flip Sight and 3-Rail Gas Block (PN YHM-9370K in the BM catalog).
so then the question: should i purchase the sight/gas block, and then send it and my upper to BM to have it installed --- OR --- send the upper in and make arrangements with whomever to have the new sight/gas block installed?
finally, what is the typical turn around for this kind of job? is it days, weeks, a month, etc?
thanks for the help,
just so we are on the same page,
this barrel (pura2b16m4)
will accept this sight (yhm-9370k)