Lancer Systems, manufacturer of the best 5.56 and 7.62 AR magazines on the market, was kind enough to loan me a L30 Heavy Metal rifle for use in my .308 Muzzle Brake Test. Although I had already shot L30s in all of the available configurations, even winning a gun writer competition with one, I still couldn’t bring myself to use this loaner solely for recoil sled testing. So, I put it through the normal review process as well . . .