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Operating Pressure Regulator (OPR)
Compound curved injected optical polycarbonate construction
Removable body allows holster to be worn on left or right side
Magnet forced loading
High Pressure Regulator
TechT BT TM7/TM15 MRT Upgrade Bolt Headwear Operating Pressure Regulator (OPR)Like all of TechT's bolts, the TM7 and TM15 MRT bolts have been through rigorous R&D and field testing. This testing guided the bolt to what is now the MRT. Initial prototypes saw the removal of the "cup seal" on the front of the stock bolt. After testing various other o rings and seals, TechT decided that the MRT needed this cup seal on the front of the bolt for the best performance. The removal of this cup seal, like on other competitors' bolts,
