TechT BT TM7/TM15 MRT Upgrade Bolt Rolling Gear Bags It is initially a 12"

It is initially a 12" barrel with Spyder thread

30 Second Breakout Drill

Techt's anti-friction cut style allows for no wasted air in the detent portion of the bolt

For those of you who have an Ultralite trigger frame installed on your PM7 or PMR then you will need to purchase a DM6/7 Virtue board along with the Ultralite Frame Adapter

TechT BT TM7/TM15 MRT Upgrade Bolt Rolling Gear Bags It is initially a 12"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,