Silverback

MDRX Piston (16 teeth)

APS 13 mm, 90 Newtons spring


This spring is following the “APS 13 mm standard” (for 9 mm outside diameter spring guide). It will fit any rifle compatible with this standard, including all SRS (except push mechanism) and all TAC-41. While being compress

“GBB” cut inner barrel, passivated brass, 6.05 mm bore, 327 mm long,
Ideal for:

– “330 mm” TAC-41 outer barrel used with “GBB” hopup unit.

“AEG” cut inner barrel, passivated brass, 6.05 mm bore, 330 mm long,


Ideal for:

– “330 mm” TAC-41 outer barrel used with “AEG” hopup unit.

“GBB” type, flat hopup rubber, 4 hardness set (50°/60°/70°/80°)


Initially designed for the TAC-41 “GBB” hopup, this hopup rubber can fit inside most of airsoft guns using “GBB” hopup rubber.

Transparent silicone for easier installation, this kit

“GBB” type, flat hopup rubber, 60°


Initially designed for the TAC-41 “GBB” hopup, this hopup rubber can fit inside most of airsoft guns using “GBB” hopup rubber.

Transparent silicone for easier installation, Light blue color, 60° hardness.