Echo1 M28 Hop Up Chamber sig sauer except it contains the internal

except it contains the internal o-ring

the AAP-01 is capable of both semi-auto and full auto firing modes by flipping the fire selector on the underside of the bolt carrier

motor and the controller

When not loaded with a CO2 cartridge

any blowback unit and bucking will work well with this nozzle

Echo1 M28 Hop Up Chamber sig sauer except it contains the internalDESCRIPTION: Echo1 M28 Hop Up Chamber Upgrade Your Precision! Elevate your airsoft game with the Echo1 M28 Hop Up Chamber, the perfect OEM replacement part designed specifically for your Echo1 M28 Sniper Rifle. Ensure flawless performance and enhanced accuracy with this high quality, reliable upgrade. While its tailored for the M28, it may be compatible with other airsoft guns, though Airsoft GI cannot guarantee fitment. Why Choose the Echo1 M28 Hop