You need the services of a gunsmith
It must be installed by a gunsmith.
Yes you can put a bipod on any rifle.
move the safety lever and hold trigger back as you remove bolt
This is a job for a gunsmith. I had to make a special vise jig to compress the firing pin spring & reassemble the bolt. Very heavy spring tension, i.e. dangerous.
about $200 if very clean
this is a bolt action spring powered airsoft sniper rifle and i highly recommend it as well i had one till it got stolen and i am about to purchase another one asap so i have experience using it.
Yes- the spring pushes on the follower, which pushes the cartridge up. Too much tension, and the cartridge is shoved against the bottom of the bolt.
I don't no about spring, but the Green Gas M700 Sniper Rifle Competition Professional Airsoft gun, has 720-FPS!!!! And the, Spring CSI L96 Bolt Action Airsoft Sniper Rifle, has 550-FPS. They are both from, Hobby Tron.com
JG BAR-10 the gun is easily upgradeable and cheap
No.
The upper and lower receivers, bolt, extractor, bolt carrier, buffer and buffer spring. Each of the major components (such as the lower) contains many smaller parts, such as hammer, sear, trigger, hammer spring, etc.
To disassemble the bolt on a Remington Model 721 rifle, first ensure the rifle is unloaded and the safety is engaged. Then, remove the bolt from the receiver by pulling the bolt handle fully to the rear and pressing the bolt release located on the right side of the receiver. Once the bolt is out, you can disassemble it further by unscrewing the firing pin assembly from the rear of the bolt body, allowing for access to the firing pin and spring. Always refer to the manufacturer's instructions or a gunsmith for specific guidance and safety precautions.