Smooth, feels (actually it is) like it’s running on ball bearings - POF USA Roller Cam Pin With Modified Gas Key AR15 .223 RCPK223

I have 4 AR15 and 1 LR308, all of them with the POF Roller cam pin. 3 AR15 are piston and 1 DI, install of the gas key needs to be properly staked for DI BCG. Prior to install on my DI AR when you initially pulled the charging handle it felt a little rough as the bolt unlock, now it feels like they are running on bearings. A couple of piston AR 15 build that I use the roller cam pin since new shows no wear on the cam pin pocket on the upper unlike my DI Rifle. Really nice upgrade!!!