For the folks here that have AR15's--or parts--I'll make this service. I am a Colt certified AR15 armorer. I can help you build your lower, upper, or do parts replacement and mods. Recent events (of which we are all aware) and the ensuing political climate have made lots of folks purchase AR15's and related items. For members of this forum, I will offer a service--I will help you with your AR15 pattern rifle. Please either post a message, which I will respond to--or post to the forum. The cost for this service? NOTHING. Yes, you have it right--zero, zilch, nada. So, let me know!