I used to have a Hellfire trigger for the 10/22 and it was a pc of junk. The other similar trigger systems are mostly gimmicks I think and would save my money for ammo.
"Always place your clothes and weapons where you can find them in the dark"
"Understand that the enemy is not the enemy in his own eyes ;this may offer you an opportunity to make him your friend. If not, you can kill him without hate, and quickly."