Depends on whether the scope (optical sight) was an original Wermacht fit with mount and accessories to the rifle. If that's the case, all the parts will have matching serial numbers. Mounts were machined to match only one rifle, not intended to be separated or interchanged with others, and matched S/N. Scopes were provided with leather lens caps, carry case, and other items.
Additionally, if scope was made at the same time period of the rifle, it will be a more desirable matched set. As in most collectibles, condition is the next best determinant of value.
If the scope is from an earlier period but with matched numbers, that will be of value.
From the 1920s to the start of Third Reich militarism, Zielvier optics were manufactured primarily as sporting use optics. Many of these were exported and/or mounted to sporting Mausers with a variety of mounts. When wartime exigencies resulted in a demand by the Wermacht, the excess supply of sporting scopes were retrofitted as upgrades to Sniper kits on Mausers. These match-ups were distinct from the later matched sets and are of somewhat lesser value all other things being equal.
Original finish, undamaged, with 90% bluing, pristine glass scope only without any mounts: $500-$600
Same as above with matched serial number mounts: $500-$900
Same as above with matched s/n mounts on matched rifle: $3000-5000 for pkg.
Condition scales downward for damage to finish, fittings, glass, internals.
Accessories add value.
More information is necessary. If the rifle has a 4-lug bolt head, it is the same as a Mossberg 810. Research the 810 for info on this rifle. It may be made on FN Mauser 98 actions, in which case it will be like any other Mauser 98 sporter. Otherwise, it will be German made by Heym and is either the same as a Mauser 2000 or Mauser 3000 action. The scope, on the other hand, is almost impossible to describe these days. It will likely have Japanese optics.
You should expect to pay around $400 to $700aus depending on the condition and whether the rifle has a scope or not
Up to $700, depending on condition, rare/unique markings, etc.
The center of the scope is offset ABOUT 2 inches to the left of the centerline of the rifle. The M1C used at least 2 different scopes. To help the shooter compensate for the scope being off center, the M1C used a leather cheek pad. The pad helped move the shooter's line of sight to the left of the stock.
I will assume you mean a Sniper Rifle. First and foremost, the earliest "Sniper Rifles" were not even scoped. They were used by marksmen and hunters renowned for their skill at killing a small bird known as a Snipe, hence the term Sniper. The un-scoped rifles were extremely accurate for their day due to the "rifling" of the barrels; in other words, the bullet was given a spin to the shot, enhancing its accuracy at greater distances, which was missing from the muskets of the Civil War. The scope itself is essentially a multi-pronged telescope or set of binoculars attached to the rifle to assist the visual sense of the human operator and inhibit natural error. The scope itself actually holds no sway over the initial accuracy of the gun. As such, a traditional sniper rifle should be either bolt-action, like the L96 or the Springfield M1903 or semi-automatic, like the Barrett .50cal. Any gun in theory can attach a scope. In the late months of WWII, the M1 Garand, the first true semi-auto rifle, was attached with the ancestor to the Police ACOG scope, allowing for a 2x telescopic view.
100 or so
More information is necessary. If the rifle has a 4-lug bolt head, it is the same as a Mossberg 810. Research the 810 for info on this rifle. It may be made on FN Mauser 98 actions, in which case it will be like any other Mauser 98 sporter. Otherwise, it will be German made by Heym and is either the same as a Mauser 2000 or Mauser 3000 action. The scope, on the other hand, is almost impossible to describe these days. It will likely have Japanese optics.
100-10000 usd
Yes, but you have to drill and tap.
Depending on who did the conversion; 100-500 USD
If you mean the scene where he shoots the rope on the ferry, that is not a flintlock. It is a Sharps 1865 rifle fitted with a full length J. Stevens brass tube target scope.
A WWII German sniper rifle is at once VERY rare. If you chance upon one at a gun show, depending on the condition of the piece, it can fetch at least $1,500. And THAT would be the low-end price for a Mauser KAR 98 (bolt action) with an original scope in perhaps rough condition. You would have to be very careful that the rifle itself had the original scope (Zeiss optik, or Henseldt type) matched to the rifle. Now the rifle itself should also have matching numbers on every piece in order for the value to be justified. There have been numerous post-war-to-present Mausers fitted with scopes and the unwary buyer not knowing this can purchase a "re-conditioned" Mauser fitted with an original German scope, but the value of such a rifle will be reduced as that sniper was not truly original. I have seen these going for $1,300. But an original GI bring-back in above average shape and un-tampered with will bring upwards of $3,000.
If the rifle is in good shape it is worth $450 to $500 You do not give enough info to price out the scope as there are many different Leupold models.
The Browning was built in 1968 on a long extractor FN Mauser action. The Leupold scope was built prior to 1974.
You need a professional appraisal. Could be in the 100-10000 or more range
Yes. You will lose 50-60 percent of the collector value if you do these things.
100-1000 USD or more depending on the specifics