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RetroArms C-CLIP barrel lock for M4 is a durable replacement part for M4 / AR15 hop-up units. The lock is made of polyamide by injection molding and can be used with RetroArms hop-up units as well as units from other manufacturers. The newly added barrel positioning feature helps keep the barrel in the correct position. Black finish.

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RetroArms CNC hop-up unit M4 / AR15 BASIC in black is designed for AR15-type AEG airsoft guns, such as the M4, MK18, M16 or SR-25. The unit body is made of aircraft-grade aluminium alloy using precise CNC machining. The collet nut ensures precise centering of the inner barrel, while the O-ring at the unit entrance prevents BBs from falling out during...
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RetroArms CNC M4 / AR15 PRO hop-up unit is the most advanced model for AEG AR15-platform airsoft rifles, including M4, MK18, M16, and SR-25. The unit body is precision CNC-machined from EN AW 7075 aerospace-grade aluminum. Its adjustable magazine well height allows compatibility with various magazines, while the adjustable gearbox alignment ensures...
C-CLIP barrel lock is used to secure the barrel in the hop-up unit of M4 / M16 airsoft guns. Thanks to its universal design, it is suitable not only for RetroArms units but also for hop-up units from other manufacturers. A practical replacement part for repairing or servicing a hop-up unit.
The lock is made of polyamide, providing the necessary durability for securing the barrel in the hop-up unit.
The integrated barrel positioning feature helps keep the barrel in the correct position inside the unit.
The lock is designed for hop-up units of M4 / M16 airsoft guns.
It can be used with RetroArms hop-up units as well as units from other manufacturers.
The lock is made in black and supplied as one piece.
| Variants | M4 |
| Color | Black |
| Body/receiver material | ABS / Plastic |