"I do a lot of WWII airsofting, and let me tell you, this little thing had a massive impact our little niche of the hobby.
I'll get the negative stuff out of the way first. This isn't a legit M1 Carbine from WWII. Its technically a M2 Carbine from the postwar era. The M1 didn't have the bayonet lug and didn't have the longer magazines. Other than that, this is gun in phenomenal. Second, mine came the stock band and sling ring upside down and reversed. The correct position of the sling ring is on the left side of the rifle (if you are holding it), but it is an easy fix. All you need is a screw driver.
After the barrel is cleaned out, this things get about 320 fps w/ .20's, and the hopup adjustment is extremely precise for a "cheap" rifle. It is quite skirmish-able and make a great back up, loaner, and/or cheap WWII gun.
The single action nature of this rifle promotes team work, marksmanship, and tactics. Not spray and pray like a CoD game.
A lot of the times, we use these Carbines as loaner weapons, to loan out to guys who don't have WWII stuff of their own at WWII events. So, these go through a massive amount of strain, and they never fail.
Last note, I believe Charley's Surplus sells M1 Carbine Oiler and Sling sets for 12 bucks. You need the oil to use the sling. That hole in the stock is where the oiler goes, and the sling wraps around it and comes out the left side of the rifle."