I have been researching each part to build my first AR and decided to go with BCM for most of the parts. I have an upper on the way from BCM 16" ELW 13" KMR. I have plans on using a BCM lower also and find that they are sold with the receiver extension already attached. I am trying to build this right the first time even though more builds may follow. Should I use the BCM tube or upgrade to the Vltor A5 system from the start?
My intentions for the rifle are to use for classes and range use.
I have researched the A5 system and realize the benefits. I am looking for current opinions from those that have experience with and without it to guide me.
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