Wheels Pump 3.5 - 4.5 atm, but through an adapter with a check valve. Otherwise, the air quickly escapes while the pump is disconnected.
To offer a more complete review, I have added some photos for your consideration.
ALONEFIRE Offset Flashlight Mount For Picatinny Gun Tactical LED Torch - Sports Outdoors Hunting Fishing Shooting Airsoft Guns Accessories Sights Optics Scope
24 Review
6" Foldable Half Face Airsoft Mesh Mask With Ear Protection And Military Tactical Lower Face Protection By OneTigris
41 Review
MetalTac Airsoft Speed Loader With Capacity Of 100 Bbs
27 Review
Maddog® Sports Padded Chest Protector, Tactical Half Glove, & Neck Protector Combo Package
23 Review