Umarex Air Javelin velocity loss

Lost velocity after disassembling and re assembling my Air Javelin. Think I know why.

[@kevinnielsen1356]

Increase the bolt spring preload by turning the adjustment screw counterclockwise. This screw is accessible thru a slot/hole in the stock mounting tube. There are a couple of good videos on how to do this on utube

[@kasetankensei]

yes! take apart video

[@highlander200268]

interesting, i have not played around with that with mine, it is more of a small game one, only mod i did with mine is get the refillable c02 cartridge

[@kidpellet6544]

Check the video's, I made one for mine. Took like 10 minutes and you can get the fill port for 6 bucks, from China that is. 16 bucks for one already in the states on Ebay

[@highlander200268]

@@kidpellet6544 yah i saw that, i already had gotten the refillable one, but i didnt think of that, the way mine works it can only be filled while in the gun, is yours the same?

[@kidpellet6544]

@@highlander200268 yes. I just wish I could remove it without dumping the co2. I could probably make another adapter with a valve at that end. Kinda like a paintball tank. But I get my co2 in a large tank for under 25 bucks, so i just dump it when I take things apart

[@highlander200268]

or put a bleed valve in back of the fill port

[@meangene5038]

Underneath the adjustable butt stock there's a hole. There's a adjustment u can make. Have u tried that?

[@kidpellet6544]

I have. It's not had any affect because I believe the hammer is dragging on the plastic casing. It was shooting 305 fps before with co2 and 290 ish with HPA at 1100 psi

[@hunter-jx4my]

Once again are you making and selling the hpa adapters ? If so how much do you get for one ??

[@kidpellet6544]

Ten bucks plus shipping

[@hunter-jx4my]

@@kidpellet6544 is that the complete adapter all I'd have to do is add my tank ???

[@garytaylor2653]

Arrow guns are great I like them and I have a crossbow for hunting deer I think you can kill a deer with it so I'm going to have fun with