Please excuse my ignorance. I have a Bushmaster XM15 and wanted to know some information on either a 22lr conversion or replacing complete upper. I don't know that much about the AR, mostly into handguns. Could someone explain the difference between the two, advise as to which would be the best. My owners manual states that I have a 1 in 9, 6 lands and groves barrel ( what ever that means). I would like to just plink with the 22lr, but accuracy would be appreciated also. Any advice as to which manufacturers are best and what to watch out for would be greatly apprrciated.
Thanks
Thanks