Yes, if you are going to get the G&P M14 which I think is a v2 or v3 GB. It will support the functioning of a heavy spring.
Lets say you are going to do this. This is what I have to be installed in my TM M14 when things start going south. Keep in mind field limits are 550 fps and I am going to only use semi. Which will make it a sniper rifle.
Try different kinds
Prometheus 6.03 EG Barrel for M14 (500mm)
SHS 15 Teeth (7 Steel Teeth) Piston (Clear Blue)
Systema Spring M150
Element Ultra Torque
Guarder Steel Gear Set for Marui Gearbox Ver.7
Modify Stainless Steel Bushings 6mm
G&P Steel Bushing V7 Spring Guide
Leapers 5th Gen 3-9x40 AO Mil-Dot Rifle Scope with R/G, 1 Tube with
AccuShot Premium 1-Inch Weaver Style See-Thru Medium Profile Rings AccuShot Premium 1-Inch Weaver Style See-Thru Medium Profile Rings