sure, The lower is about 2 years old and I've been shooting it with the 15 minute trigger job since day one, found here: http://www.sargenthome.com/15_Minute_AR_Trigger_Job.htm
I've shot roughly a little less than two cases of ammo through the receiver. Functioned 100% for me. Lower reciever is considered firearm so must be sent to your local FFL. I'd need the FFL address to get this shipped ups after payment.