![T4E TR / HDR68 STEEL Tuning Barrel with thread +2 attachments - (Up To 40J+ When added to our TR68 Custom Home Defense)](http://hotspotairsoft.com/cdn/shop/files/TR68_tuning_barrel_W_Ext_{width}x.jpg?v=1712091858)
Details | Improvement:
- Extreme fit tolerances
- increased precision
- Diameter (inner) 17.3 mm
- Silencer thread including reinforced spring
- Anti-twist protection
- Attachment length 10cm
- with additional thread protection cover
- all three components are burnished
- Performance increase when installed in our TR68 CUSTOM HOME DEFENSE REVOLVERS!
- very high longevity