TechT BT TM7/TM15 MRT Upgrade Bolt Rolling Gear Bags Picatinny universal mounting rails

Picatinny universal mounting rails

30 Second Breakout Drill

This kit includes both front and back vernier wheels with magnets for the A4

The LED will either blink red or green

Easy access firing engine for maintenance

TechT BT TM7/TM15 MRT Upgrade Bolt Rolling Gear Bags Picatinny universal mounting railsLike 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,