Like
bubba.50 says, some full length photos and some photos from the butt to the lock area would help with the overall architecture identification.
Also, can you count the number of lands/gooves and possibly measure the rate of twist of the rifling? That info can help identify the barrel maker.
From the photos you have posted, I can tell you that it has a Ron Long designed lock. Ron sold his locks fully assembled and as a lock kit for the customer to assemble. It looks like your lock was one of those kits.
I can also tell that the breech and tang is one that Cherry Corners made. Cherry Corners started offering their hook breech in the early 1870's. This ad is from November 1972
Muzzle Blasts magazine.
By 1974, they were offering a complete Hawken kit. This ad is from September 1974
Muzzle Blasts.
As a teaser, Green River Rifle Works used these same components on their rifles from 1974 through most of 1976 when the Cherry Corners parts were no longer available because Cherry Corners sold out to Ithaca Gun Co.
There is a possibility that your rifle was made from GRRW kit. But I need to see more pictures of the whole rifle and info on the number of lands/grooves to be able to tell for sure.