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The Extreme Tactical Chassis

Looking for Big Bore Air Rifles?

Weaver 45 Top Mount Base

Out of stock
Product Details

Each Weaver base is machined to the tightest tolerances for a custom fit. They are designed to fight the effects of recoil with a square-cut notch that precisely mates to the sturdy cross bolt in every Weaver detachable ring.


Fits all Extreme Big Bore Air Rifles

  • Browning Bolt Actions, Hi-Power (older models) (rear base)
  • CIL 972-C (rear base)
  • Colt 57 (rear base)
  • H & R 300, 301, 330, 370 (before 1973)(rear base)
  • Herters J9 (rear base)
  • Marlin 455 (rear base)
  • Mauser (including FN, HVA and Swedish) 98 Large Ring (rear base)
  • Modern Muzzleloading LK-93, Wolverine, Legend (round receiver) (front and rear base)
  • Musgrave Mark III and Mark IV (rear base)
  • Parker Hale 1000, 1000C, 1100, 1200, 1700 (rear base)
  • Sears 50, 51 (rear base)
  • Springfield 03-A3 (front base)
  • Voere 2150, 2165/1, 2165/3, 2165/4 (rear base)
  • Weatherby Models with FN actions (rear base)

Note: Mounting Screws Included

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Extreme Big Bore Air Rifles proudly recommends Mr Hollowpoint ammo.
Here is a little bit of information about Mr Hollowpoint…
aka..Robert Vogel.
Click this area to read more….

“I bought my first big bore in 2005
Was sadly disappointed in ammo options and started casting in 2007.
Started my website in the fall of 2007 and never looked back. 
I was the first to develop hollowpoints exclusively for air rifles. 
I have hollowpoints from the tiny 177 all the way to the might 82 cal.
My goal has always been to find the fastest way to dispatch a animal with the air rifle. 
Everything bullet is hand cast and sized to your caliber needs. 
I personally hunt and harvest with my hollowpoints to help understand how they perform and how to make them better; and continue with each new caliber that comes out.” – Mr Hollowpoint

Interested in more info? Email Mr Hollowpoint at: