Opinions please New Rifle design

hi everyone have been reading your modification posts for some time now and have been designing parts for my stealth based on the things ive been reading during which i came up with something different what im looking for is your opinions the picture you see here is a complete blueprint that has taken me around two years to design ive costed it and it is economically viable should be around the 1000 pound sterling mark by the way excuse my punctuation or lack of i talk this way without breath so i never knew where to put commas sorry i will be trying to get the cash together to produce it if there is enough interest you guys have taught me a lot thanks could you please leave a quick yea or nae if you read this it will be regulated and have quick change barrels .177 .20 .22 and .25 @ 24″ long and 9mm @ 28″ long valve spring pressure is adjustable hammer spring pressure is adjustable valve lift is adjustable two pressure gauges quick fill tank angle adjustable grip so heres the pic thanks again