Hi all,

I am building a LMT MRP CQB with the CL 16" barrel.  Upper/stock should be here tomorrow.

I ordered their M4 Stock Assembly with the upper.  First does anyone know if the assembly comes with the buffer and buffer spring?  

Second if it doesn't should I go with LMT's Heavy Carbine Buffer (item # L7CB2F) or should I stick with a standard carbine buffer?  I will be shooting a wide variety of ammo through this upper.  Everything from 55-77gr bullets.  Maybe lighter than 55 it it will shot them OK.

I am after the BEST in reliability and want to make sure everything is right.  

That's it for now.

Thanks!