Need seal and hardware for rebuild

Bad seals in Daisy bb and pellet guns cause this. Get the seals replaced in it and it will work. Look on the web for service on BB guns.

You can buy o ring cord and make your own

The Daisy model 99 Champion was produced in 1967 only. This 46 year old target special model features an adjustable windage and elevation rear peep sight with a hooded front sight and gravity feed magazine. The gun is sighted in at 25 feet and has a lot of power. Price is almost $110 to $140.

Yes. You should have left that to the pros.
Now recommend you contact the manufacturer directly here:

https://www.daisy.com/contactus

I trust this information proves beneficial.

register and join this daisy gun forum
How to rebuild 1938B Red Ryder

http://www.ebay.com/itm/Daisy-Powerline-7880-880-35-880s-Rebuild-Kit-Reseal-Seal-Gun-BB-Air-Rifle-Set-/151539675066

check with Numrich Gun Parts, they might have something for you.
Firearm Parts Accessories Military Surplus Numrich Gun Parts

Daisy Powerline 856 Manual

http://www.ebay.com/itm/Daisy-856-860-Rebuild-Reseal-Kit-Seal-Gun-BB-Air-Rifle-Set-O-Rings-Parts-Seals-/152432029624


https://thefiringline.com/forums/showthread.php?t=86965

COMMENT Federal Regulation of BB Guns Aiming to Protect Our Children

You might enquire about a product recall for the 856 but the original page referring to the recall has been removed. [email protected]

Or you could try contacting Daisy and see if they retain any information about any modification (but they are unlikely to have any parts for it, now.) The problem was that the earlier design of the 856 and 880 allowed a pellet to be lodged in the mechanism, unknown to the shooter. This could result in inaccuracy during firing. The 856 was modified to single shot rather than magazine by 2001 at which time Daisy was not found culpable in several deaths (resulting from direct firing at a party). I retrieved the findings using the Wayback Machine at the Internet Archive. The US Government site has removed the findings for some reason.