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View larger Barrel Lock for M4 / M16 Chambers by ASG ULTIMATE in blue.
Secure inner barrel lock for AEG chambers of the M4 / M16 type (with a cutout for standard TM locks).
Prevents barrel rotation during installation.
Lightweight plastic part for precise barrel alignment.
Not compatible with MAXX Model chambers.
: Pro Win
PW0004
CNC Hop-Up Chamber by Pro-Win for AEG rifles M4 / M16 in blue. Adjustment ring for stable hop-up tuning. High-precision CNC machining from aircraft-grade aluminum. Anodized finish in cobalt blue. One of the most widely used upgrade chambers. Improves performance and accuracy when properly sealed.
This small but important upgrade component is designed to secure the inner barrel in the correct position within the hop-up chamber. Thanks to its special cutout, the lock fits perfectly into the groove on the inner barrel and prevents it from rotating during chamber installation or when manipulating outer accessories like suppressors or barrel extensions.
Installing the barrel lock helps increase accuracy and maintain consistent performance by eliminating unwanted barrel shifts that could disrupt the BB trajectory. This part is designed for AEG barrels with a locking groove and is compatible with standard M4 / M16 hop-up chambers following the Tokyo Marui spec.
| Color | Blue |
| Body/receiver material | ABS / Plastic |