Echo1 M28 Hop Up Chamber sig sauer any blowback unit and bucking

any blowback unit and bucking will work well with this nozzle

Full metal slide with light weight polymer frame

When not loaded with a CO2 cartridge

except it contains the internal o-ring

Echo1 M28 Hop Up Chamber sig sauer any blowback unit and buckingDESCRIPTION: 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