Delivery before X-MAS only for orders received by December 17, 2025.
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CNC Hop-Up Chamber AR15 BASIC by RetroArms in black.
Designed for AEG AR15 rifles (M4, MK18, M16, SR-25, and others).
Made from aircraft-grade aluminum EN AW 7075.
Ready for R-Hop and standard buckings.
Collet nut ensures perfect barrel centering and stability during firing.
O-ring in the chamber inlet prevents BBs from falling out during reloads.
Easy installation with no tuning required.
MPLF005
Precision Inner Barrel for AEG by Maple Leaf with a diameter of 6.02 mm. Length of 370 mm (M4, MK18 BLOCK 2, HK416D, SCAR-H, M249, MK46 and other models). Increases performance, range and accuracy. Compatible with AEG guns of TM (Tokyo Marui) standard. Barrel cutouts for both AEG and GBB / VSR hop-up chambers. AEG variant with bridge.
4UAD001
High-quality 4UANTUM Friction hop-up bucking by 4UAD for AEG / HPA rifles. Redesigned nub for perfect range and accuracy. Capable of hop-up for heavy sniper BBs up to 0.48g. Traditional single-point nub with minimal room for BB misalignment. Accuracy, range, and precision, that’s what it’s all about!
The AR15 BASIC hop-up chamber is a high-performance unit from Czech manufacturer RetroArms, designed for AEG replicas based on the AR15/M4 platform. The body is precision CNC-machined from EN AW 7075 aluminum. The chamber inlet features an O-ring that prevents BBs from falling out during reloads. The collet nut ensures barrel centering and eliminates unwanted movement, regardless of the outer barrel diameter (compatible with 8.4–8.5 mm barrels). The BASIC version is the easiest to install, requiring no adjustment to nozzle length or gearbox alignment. It’s also fully compatible with most hop-up buckings.
| Color | Black |
| Hop-Up chamber material | Metal |