Uploaded September 2021 | Updated September 2026, 2 weeks ago
This tutorial video show how to swap the hopup rubber (GBB type, optional hopup). Changing the hopup rubber will affect the muzzle energy of your airsoft gun, users should obey to laws regarding ownership of airsoft guns in their country.
SBA-HOP-31, "GBB" hopup unit for TAC-41 (LINK) include:
- T41-0226 hopup body “GBB” (aviation grade CNC construction)
- T41-0227 hopup rubber socket (aviation grade CNC construction)
- T41-0228 barrel clip (SS304 laser cut)
- T41-0202 hopup wheel
- T41-0203 concave nub
- T41-0224 feeder
- T41-0225 feeder spring guide
- T41-1008 spring
- HOP-316001 60° flat hopup rubber, “GBB” type
- M5X6 ISO7380-2 screw
- M3X6 ISO7462 screws (x3)
- M4X8 DIN7991 screw
- M4X5 ISO4027 screws (x2)
- oring 8×2 (x1)
- 4 mm ball plunger
This TDC (Top Dead Center) hopup has 0.75 mm nub travel amplitude, divided in 50 positions (15 µm per clic). It includes a feeding system to avoid double feed, a 60° flat “GBB” hopup rubber (SBA-HOP-41), and it is compatible with “GBB” hopup rubbers and “GBB” inner barrels. To accommodate different brand of barrel, it can be assembled either with the barrel clip, or with the 3 M3X6 screws.
Because of a different inner barrel position inside the hopup, this unit require inner barrels at least 3 mm shorter than the “AEG” hopup unit equipped with the same outer barrel to avoid inner barrel sitting out of the outer barrel.
- “510” outer barrel requires a 507 mm GBB inner barrel
- “420” outer barrel requires a 417 mm GBB inner barrel
- “330” outer barrel requires a 327 mm GBB inner barrel
This hopup unit is compatible with the advance hopup kit (SBA-HOP-34)
Music: Pretty Lights - The Time Has Come
soundcloud.com/nuro-salja/pretty-lights-the-time-has-come
This tutorial video show how to swap the hopup rubber (GBB type, optional hopup). Changing the hopup rubber will affect the muzzle energy of your airsoft gun, users should obey to laws regarding ownership of airsoft guns in their country.
SBA-HOP-31, "GBB" hopup unit for TAC-41 (LINK) include:
- T41-0226 hopup body “GBB” (aviation grade CNC construction)
- T41-0227 hopup rubber socket (aviation grade CNC construction)
- T41-0228 barrel clip (SS304 laser cut)
- T41-0202 hopup wheel
- T41-0203 concave nub
- T41-0224 feeder
- T41-0225 feeder spring guide
- T41-1008 spring
- HOP-316001 60° flat hopup rubber, “GBB” type
- M5X6 ISO7380-2 screw
- M3X6 ISO7462 screws (x3)
- M4X8 DIN7991 screw
- M4X5 ISO4027 screws (x2)
- oring 8×2 (x1)
- 4 mm ball plunger
This TDC (Top Dead Center) hopup has 0.75 mm nub travel amplitude, divided in 50 positions (15 µm per clic). It includes a feeding system to avoid double feed, a 60° flat “GBB” hopup rubber (SBA-HOP-41), and it is compatible with “GBB” hopup rubbers and “GBB” inner barrels. To accommodate different brand of barrel, it can be assembled either with the barrel clip, or with the 3 M3X6 screws.
Because of a different inner barrel position inside the hopup, this unit require inner barrels at least 3 mm shorter than the “AEG” hopup unit equipped with the same outer barrel to avoid inner barrel sitting out of the outer barrel.
- “510” outer barrel requires a 507 mm GBB inner barrel
- “420” outer barrel requires a 417 mm GBB inner barrel
- “330” outer barrel requires a 327 mm GBB inner barrel
This hopup unit is compatible with the advance hopup kit (SBA-HOP-34)
Music: Pretty Lights - The Time Has Come
soundcloud.com/nuro-salja/pretty-lights-the-time-has-come
