Yea I guess technically it is just a sight lol,But I plan on just staying inside the 100yrd range with this gun,I have an old 1968 Voere 30-06 bolt gun for longer range shooting. My 308 extractor spring is no where near the size of that one its exact same size as the AR15 spring I put in,And is also just a single spring w/Rubber O ring..It is extremely hard.When I released the BCG to chamber a round it wouldn't slip over the rear of the cartridge.Itd just push straight into the back of the cartridge and not go into full battery.I took the O ring off and it didn't didn't help.Swapped to the AR15 spring and it chambers great,No jams,stove piping or anything.Figure I'll at least get 500rds out of it,and at $1 I don't mind replacing it periodically lol...Thanks on the info about the rifle stock,Didn't realize I have to change all of that to use it(glad you told me so I know what to get).Is it pretty comfortable as far as length wise?