Madbull Black Python ll 6.03mm Tight Bore Barrel - 229mm Pistol Cases They fit most M4/M16 variants

They fit most M4/M16 variants as well as G&G's GR15/GR16 series of AEGs

Use 2 AA batteries (extended battery life time compared to the MK2 which used AAA)

Mount available here

Very high quality ABS plastic construction with lots of metal parts

Madbull Black Python ll 6.03mm Tight Bore Barrel - 229mm Pistol Cases They fit most M4/M16 variantsA precision 6. 03mm inner barrel from Madbull. The Black Python is a tried and tested inner barrel. By using a hard coating process, the barrel provides the smoothest inner barrel surface possible and and overall reinforced structure. Its also complete with a great looking black finish. Precision made in Hong Kong. Features a 6. 03mm inner diameter and total length of 229mm. Suitable for barrel lengths as found in short M4s MP5s and AK Betas. Improve