The Phase 5 Weapon Systems Inc Low-Drag Shotgun Follower 12 Gauge will fit most factory 12 gauge magazine tubes and should work fine with a Mossberg Shockwave.
The Phase 5 Weapon Systems Inc Low-Drag Shotgun Follower should be compatible as it fits most factory 12-gauge shotgun magazine tubes and extension tubes without spring/follower retention dimples. I would still recommend reaching out to the manufacturer directly for fitment confirmation.
The Phase 5 Weapon Systems Inc Low-Drag Shotgun Follower 12 Gauge will work in a KelTec KSG.
The Phase 5 Weapon Systems Inc Low-Drag Shotgun Follower should be compatible with both the 1200 and 1300. However, Phase 5 does not specifically state that they are compatible. Phase 5 says it should fit most factory 12-gauge shotgun magazine tubes and extension tubes without the spring/follower retention dimples. You will need to remove the dimples or exchange the magazine tube to install. I would recommend reaching out to Phase 5 Weapon Systems directly to confirm compatibility. You can find their contact info linked below:
https://phase5wsi.com/contact-us/
No. The Phase 5 Weapon Systems Inc Low-Drag Shotgun Follower is not compatible with the Winchester SX2, SX3, and SX4.
The Phase 5 Weapon Systems Inc Low-Drag Shotgun Follower should be compatible with Winchester 1200. However, Phase 5 does not specifically state that they are compatible. Phase 5 says it should fit most factory 12-gauge shotgun magazine tubes and extension tubes without the spring/follower retention dimples. You will need to remove the dimples or exchange the magazine tube to install. I would recommend reaching out to Phase 5 Weapon Systems directly to confirm compatibility. You can find their contact info linked below:
https://phase5wsi.com/contact-us/
It will likely fit, but please be sure to refer to this compatibility information provided by Phase 5:
Compatibility:
*Fits in most factory 12-gauge shotgun magazine tubes and extension tubes WITHOUT spring/follower retention dimples. You will need to remove the dimples or exchange the magazine tube to install the 12GSF.*
Semi Auto:
Benelli M2 & M4
Mossberg 930
Remington 1100 & 11-87
Stoger M3000
Other 12GA semi auto shotguns
Pump:
Mossberg 500
Remington 870 (must remove dimples)
Keltec KSG (takes two)
Other 12GA pump shotguns
NOT Compatible with:
Benelli Nova, SuperNova, Vinci or Super Vinci
Browning BPS or A5
CZ 612 or 712
FN SLP
Franchi 912 Variomax
Winchester SX2 & SX3
Yes, it should be compatible with a Mossberg 930.
It will likely fit, but please be sure to refer to this compatibility information provided by Phase 5:
Compatibility:
*Fits in most factory 12-gauge shotgun magazine tubes and extension tubes WITHOUT spring/follower retention dimples. You will need to remove the dimples or exchange the magazine tube to install the 12GSF.*
Semi Auto:
Benelli M2 & M4
Mossberg 930
Remington 1100 & 11-87
Stoger M3000
Other 12GA semi auto shotguns
Pump:
Mossberg 500
Remington 870 (must remove dimples)
Keltec KSG (takes two)
Other 12GA pump shotguns
NOT Compatible with:
Benelli Nova, SuperNova, Vinci or Super Vinci
Browning BPS or A5
CZ 612 or 712
FN SLP
Franchi 912 Variomax
Winchester SX2 & SX3