AIM TOP Matrix Polycarbonate O-Ring Air Seal Nozzle for M4 / M16 Airsoft AEG Series

"Works perfectly. After install I shot 10 rounds thru my chrono and got 357.5 literally all 10 shots, not a single fps diviation. It blows my mind and I WILL be getting for all my m4s. If I could I'd post the picture I took after my testings. BUY THIS

"This nozzle works very well. I had a stock g&g predator(polymer version) and it shot 325 fps average. I replaced the stock nozzle (no internal O-ring) with the aim top. It jumped to 346-350. For a cheap nozzle this is an amazing result. Replace your stock nozzle with this it is worth the money

"This Nozzle is great, and bested my stock air nozzle's seal. It's only receiving 4 stars because it's a little bit of a hit or miss. The first one I ordered had a crack down the side that compromised the air seal; However, the replacement that the oh-so-amazing evike customer service sent me was perfect.

"Only three stars b/c quality seems good and has o-ring but leaks when fitted on krytac poly, guarder alum, or Lonex alum cylinder heads. To be honest, I didn't chrono test since I checked compression seal with cylinder, head, and piston first. Slowly leaked from the bottom of nozzle where it meets the cylinder head as I compressed the piston.