yeah, we have a few M16A2/M4's that need barrels checked for group size after new barrels went on. I'll send a MK-19 and M240B for familiarization firing as well FRG1Welcome aboard, HaveBlue83, it looks like you may need a helper in your job, if you want to send any arms to me for "test firing" I'll be happy to help. GI2GI2 If you decide I can help, please send suitable ammo with each device. MCORPS1 I'm sure you will enjoy the forums and being here with most of us. Have fun.