G&p "Punisher" custom build - MAGPUL PTS Selector for M4 GBB (WA/G&P Version) install - YouTube
This a g&p the punisher custom build done for a customer.. install include new g&p steel buffer lock. magpul pts selector switch gbb. g&p steel bolt catch. ace ltd utra light stock.g&p steel anti rotation pins. new steel hammer. with reassembly of lower.....