Precision inner barrel M4A1, SIG 551, XM177 - 407mm KM Head

Precision inner barrel M4A1, SIG 551, XM177 - 407mm KM Head

Precision inner barrel M4A1, SIG 551, XM177 - 407mm KM Head is designed for M4A1, SIG 551 and XM177 airsoft replicas. It features precise inner diameter machining for improved air seal and shooting consistency.

Made from high-quality steel, the barrel provides durability and long service life. The optimized inner diameter supports stable performance and efficient energy use during firing.

It is suitable as an upgrade part to improve accuracy and effective range. The design follows standard dimensions for compatibility with most AEG models of the listed platforms.

Features
– precision inner barrel
– length 407 mm
– designed for M4A1, SIG 551, XM177
– steel construction
– precise inner diameter machining
– improved air seal
– increased accuracy and range
– compatible with standard AEG
– manufacturer KM Head