WTS Tikka Biathalon/Globe Iron Sight Mounts

[cal30_sniper]

This summer I designed some adapters to mount European Biathalon rear sights and Williams Precision Muzzleloader Globe front sights onto a Tikka T3x. In order to reduce cost per unit, I had ten sets machined instead of the two I needed. I've decided to keep three, but am selling the other seven sets to recoup machining costs.



The set includes:

• 11mm rear dovetail (hardened steel) and hardware to mount to the factory T3x scope base screws
• Clamp on front sight base (hardened steel) and hardware configured to mount a Precision Muzzleloader Globe sight on a .750" diameter barrel
• Adapter sleeve (6061 Aluminum) to adapt a Tikka sporter barrel taper (at 20") to a .750" outer diameter for mounting the clamp on front sight base

The set does not include:

• Rear Sight (many biathalon, air rifle, and other olympic-style 11mm dovetail options available on eBay. Search for "anschutz" or "diana" diopters or for "biathalon sight" for examples.
• Williams Precision Muzzleloader Globe (can be had with a variety of front sight inserts, including fiber optic dots, crosshairs, etc)

Selling these for $200 a set + shipping, which will again include all hardware but NOT the sights themselves. I'll also include some basic installation instructions and torque specs. See description and photos below for a better description of what you're getting and what it's designed to do. I don't aim to commercialize these, and don't plan to make any more, so once these are gone that's it. I'm not making any money on these (they cost more to machine than I'm selling them for), just trying to recoup some funds I tied up in making the 2-3 sets I need somewhat of a reasonable cost.

Specific Design features:

• Front sight height configured to match the midrange of turret adjustment of the rear biathalon style sights. This has been near perfect on all three rear sights I've tried it with.
• 11mm rear dovetail is reversible to mount the rear sight further to the rear (over the bolt-handle) if desired. Works great for lighter recoiling calibers.
• Front sight base includes a spot to mount an M4x0.5mm 90deg flathead screw to use the factory front sight base screw thread on iron sight Tikkas (Ranahan, Drover, etc) to align the front sight base vertically before clamping down. When used on a Ranahan/Drover, this also allows the front sight base to function as a shoulder for the muzzle device to tighten against (on the Drover, with M15 muzzle thread, there's not enough barrel shoulder left to line up a suppressor muzzle device. The front base design solves that problem).
  • This also is threaded to accept a normal threaded screw as an additional setscrew if your rifle doesn't have iron sights. In that case, I just use a digital level to adjust the front sight base before clamping, and ended up within a couple of rear sight clicks of the same setting. See photo detail below of this screw location within the milled pocket inside the front sight base:
• The sight base is threaded to accept the #8 globe mounting screw, as well as additional #6 set screws from either side at the rear to firmly secure the front sight against abuse. The 'ears' on the front sight base are also designed to protect against impacts/abuse that could damage the aluminum globe front sight.
• The sights are set up for using a Rokstok or other high-comb stock. They'll still work with a normal stock, but the position isn't as natural.
• The front sight base is designed to either mount on a .750" diameter barrel (Preferred Barrel Blanks Tikka Hybrid or Taperless .750), or with an adapter sleeve (included) on a factory Tikka sporter barrel of 20" in length (Drover, Ranahan, or shortened sporter barrel)
  • Kampfeld Customs can also install a .750" diameter 1" long shoulder when shortening and threading your factory sporter barrel that the front base can mount on. They did this on the 6.5x55 I've been shooting with these sights:
  • When using the factory sporter barrel, you install the aluminum sleeve to take up the space between the barrel and the .750" ID front base. This can be installed on longer barrels, but you'll still want to put the front sight base about 20" down the barrel so it tightens up correctly. Once clamped with the setscrew tightened, it makes an extremely rigid mount. You can see the sporter adapter sleeve, as well as the function as a muzzle device shoulder, in the photo below:
  • 
• Front sight base uses 1/4-20 Torx-head screws (hardware included) so you can really tighten down on them without stripping. I've been running mine with red Loctite torqued to 70in-lbs with good results.

Additional Photo details:

Rear 11mm dovetail (note how it's reversible for different sight locations):




Front Sight base:




I've tested these extensively on .308 and 6.5x55 rifles with Anschutz and Diana rear diopters. My average 10 shot group size is between 1.5 and 2MOA. Switching back to scopes on these same rifles reveals no statistically relevant improvement in accuracy from one setup to the other on paper at 100yds. Obviously there are low light and magnification advantages to scopes, but these are going to be as good as it gets for iron sights.

 

[RockAndSage]

Cool setup. What would you say the total cost of all this would be for someone who bought one of your sets, and put together identical front and rear to yours?

 

[cal30_sniper]

Cool setup. What would you say the total cost of all this would be for someone who bought one of your sets, and put together identical front and rear to yours?

List price for the Williams Western Precision Muzzleloader Globe front is $67.95 with a full set of card reticles. It can had a bit cheaper with other reticle options from certain places, including options with just the fiber optic inserts.

Biathalon rear sights like I show in the picture are around $300-400 new. They can be had much cheaper off of eBay. I picked up one for a Walther air rifle that was very solidly built for $100. From what I've seen, $200 gets you a really nice used sight on used market, including shipping from a foreign eBay seller. The Anschutz I've been playing with has 0.01mil click adjustments at this sight radius, you can get away with a lot more rudimentary sight for a hunting (or really any) application.

Tally the above and figure on adding $150-300 to finish this out depending on the quality of rear sight you desire.