PEW Science Omega Metric study in the subsonic 9x19mm combustion regime Using the HK SP5-A2 and SP5K-PDW weapon devices is underway. Note that the PEW Science HK SP5-A2 possesses an 80-deg locking piece in its bolt copyright group, which can cause lower bolt copyright group rearward velocity than devices possessing standard angle locking parts. Thi