RETROARMS 3K-Carbon Outer barrel for AR-15 - 7 inch

Lightweight and strenght carbon outer barrel, its acoustic layered fabric inserts prevents the inner barrel from vibrating during firing and, at the same time, does not transmit the noise of firing to other parts of an airsoft replica.
The pressure of the Hop Up chamber is controlled by an integrated Hop Up chamber pressure mechanism, which press the chamber to the gearbox through the pressure ring and thus prevent the Hop Up chamber from bouncing when firing, at the same time, this prevents unwanted air leaks between the nozzle and the Hop Up rubber.
The outer barrel is delivered completely assembled. The carbon tube is threaded and glued to the aluminium parts at the factory with PUR glue to ensure maximum rigidity of the barrel.

Compatible:

• Retroarms hop up chamber for AR-15 (ref. 6388), 1 pc O-ring is needed for the installation (not included)
• Hop Up Chambers from other manufacturers, due to the different lengths, it is necessary to measure the length and possibly add another O-ring.

Attention:
Adding an extra O-ring could prevent the pressure from releasing properly.