CYMA M1 Carbine Springer
That's looking really nice. I'll have to dig out my stock and get working!
Very. They're accurate up to about 50m, if you do a little work they're pretty quiet too. Nice and light, short and decent size magazine.
And BBguns4less have them in stock for £55. Unfortunately no natural colour stocks, only 2 tone blue, so some painting required.... https://bbguns4less.co.uk/products/agm-m1b-spring-m1-carbine-sniper-rifle-in-blue.html
And spare 40 rnd mags at Airsoft World.... https://www.airsoftworld.net/agm-spring-cocking-m1-carbine-40rd-spare-magazine.html