DelTon is using what brand ???? More than likely they are not MPI tested, have the correct extractor insert (for a carbine), or the added help of the Crane O ring.
The barrel and BCG is not the place to go "cheap" on the AR
DelTon uses DPMS in all actuality i believe that del Ton is owned by DPMS. if you notice other than selling RRA 2 stage triggers the only other AR company represented on thier sight is DPMS.
i am going to have to agree that with less than a $15-$20 differnce go with the LMT or BCM bolt.
but i really don't think you will notice much difference between any of them.
i am using CMT bolts and havn't had a single problem with them one has the "properly Staked" gas key and the others two have a top stake 1 has over 8k rounds and it hasn't budged. I also have an LMT BCG and Colt BCG and haven't noticed that one performed better or worse than the other.
My LMT doesn't get shot as much as my STAGs and Ive only shot the colt like twice it was more so picked up as an investment as the price was right.
the LMT is Owned by my living trust and will be handed down to my son and with what I have invested in it so far i would probably cry if i scatched so its so its more of a my LEGO toy show piece. my stags and S&W are my go to fun toys If OBAMA gets in and the price goes up enough for the Colt it will get sold. as of right now its all stock and i have no intention of decking it out.