The Silverback Airsoft M160 APS 13mm Type Spring for SRS Pull Bolt Version, 13 mm outside diameter, 11 mm inside. The APS large type is stuiable for APS-2, APS-T96, APS-SR2, M24 versions.
Items included:
1x Silverback Airsoft M160 APS 13mm Type Spring for SRS Pull Bolt Version
The Silverback Airsoft M160 APS 13mm Type Spring for SRS Pull Bolt Version, 13 mm outside diameter, 11 mm inside. The APS large type is stuiable for APS-2, APS-T96, APS-SR2, M24 versions.
Items included:
1x Silverback Airsoft M160 APS 13mm Type Spring for SRS Pull Bolt Version
Dropped right in to my TAC-41P but this shot super hot. 3.35J with sniper BBs.
On 0.20g it chrono'd at about 530fps with the hop-up off. With the hop-up on, it chrono'd at 560fps (BB stayed in the barrel longer so got more efficiency out of the cylinder).
On 0.40g, it chrono'd at 425fps, 3.35J.
If you're trying to stay at 2.8J, I'd try the SPR-3100 (100N spring). If the 100N doesn't work, I'll try a WASP piston to tweak it or something with an airbrake.