Increasing the muzzle for statable airflow.

Fits for KSC M4A1 SYSTEM-7 TWO HOPUP

All KSC M4 GBB Interchange Barrel Products for choice.

Fits for M4A1 (Original Length)

Bore Size: 6.02 mm
Length: 370 mm
Material: BRASS

Weight: 88g

Item No.: TN-23
Suggested Retail Price: USD 36.00