Gunsmithing Short-stroke piston swap into PSL

The PSL was considered a "Designated Marksman" rifle,they were used to keep the enemies heads down while the guys with AK's got in range. It's my opinion that they will never be accurate for more than a couple rounds due to the outer diameter of the barrel. The hotter they get the worse they shoot. There is a company that sleeves barrels with a heat absorbing material and basically makes them bull barrels but the name escapes me.
 
The PSL was considered a "Designated Marksman" rifle,they were used to keep the enemies heads down while the guys with AK's got in range. It's my opinion that they will never be accurate for more than a couple rounds due to the outer diameter of the barrel. The hotter they get the worse they shoot. There is a company that sleeves barrels with a heat absorbing material and basically makes them bull barrels but the name escapes me.

Teludyne Tech is the name of the company and the system is called Straight Jacket.