gemtech can

Gemtech Multimount on my SBR'd Scorpion, just goes pfff pfff now. Didn't affect Zero on my red dot either. Real easy to take apart to clean & reassemble. (They suggest 250 rnds/cleaning) I shot 150 rnds of new Freedom 147 on Wed, Bolt was marginally dirtier than no can. It took for ever to get...