WHAT DOES AR-15 OPTICS MEAN?

This is a PM schedule I took from Jeff Gonzalez. I Allow my plinkers go until one thing breaks though.Regardless of the ins and outs of their policy, fuck them. Which can be an improved ebay different for providing gun parts? I choose auction design and style.I shoot USPSA/IPSC with lots of people that follow with airsoft among which happens to be