Airsoft & Paintball Equipment
ULTIMATE M4 / M16 HOP UNIT AIRSOFT AEG MECHBOX
ULTIMATE UPGRADE M4 / M16 HOP UNIT The ULTIMATE Hop-up chamber in combination with the ULTIMATE Air nozzle has practically no loss
https://www.bizrate.co.uk/paintballgear/ultimate-m4-m16-hop-unit-oid4253988725.html
