Shocktech FGP LPR Knob - Black Push Soft Ears Oversized Porting and Flow Path:

Oversized Porting and Flow Path: This feature eliminates flow restrictions and further improving efficiency

we recommend completing your build with the Deadlywind Hair 45 Trigger Valve for the 170R

Protect your throat with the Planet Eclipse Overload Neck Protector

Easy micro adjustment via the 5/64 allen key hole in the front

The DSR+ Mech drive system uses precisely the same amount of air every shot

Shocktech FGP LPR Knob - Black Push Soft Ears Oversized Porting and Flow Path:Shocktech FGP LPR Knob Black Although they come standard with the FGP, they also fit many other aftermarket regulators. A very small part with a very big job.