Details: B0489 Burris Model 410299 SU-BBSA STD 1-piece black Scope Base for Browning bolt short action, steel with black finish, missing the 3 screws, fits Leupold style STD rings (see definitions below), fits Browning bolt action short action rifles (exactly which models, I don’t know), may require drilling and tapping if the receiver has not already been drilled/tapped for a scope mount.

 

Condition: Like new condition (new old stock) in worn box, missing the 3 screws, see the photos for further details.

 

Payment through PayPal only.  Payment is due three days after the end of the auction.  If there is an issue with your purchase when it arrives, please message me within three days following delivery so I have an opportunity to address the issue and make it right.

 

Shipping via USPS Ground Advantage.  US bidders only.  Please check out my other listings as I will be selling thousands of other scope related items from my late uncle’s scope business soon.  Thanks for viewing my listing!

 

 Definitions:

 

1-Piece: The base is a single unit that bridges from the front of the receiver (ring portion) to the rear (behind the ejection port).  Often referred to as a Redfield Junior (Jr) style.

 

Leupold style STD/Standard mounts: The forward base section accepts a dovetail style ring, which inserts and twists into place, locking it solidly into position, while the rear ring is secured by windage adjustment screws, which clamp the base of the ring on the rear base section.  Redfield calls this mounting system STReamline.  THIS IS THE TYPE OF RINGS THAT THE LISTED BASES FIT

 

The listed bases will NOT fit the following:

 

Standard Dovetail style mounts are meant to attach to the integral dovetail grooves machined into the top receiver of some firearms (mostly air guns and .22 caliber). 

 

Weaver-style mounts predate Picatinny rails.  Weaver mounting rails have slots that are .180” wide and do not necessarily have a consistent spacing between the grooves.  Picatinny slots are .206” wide with a center-to-center groove width of .394”.  Picatinny accessories will not fit on a Weaver rail, but Weaver accessories will fit on a Picatinny rail.

 

Dual Dovetail style mounts are meant to pair up with Dual Dovetail rings, which twist and lock into place in the base (either a 1-piece or 2-piece base).  Both the front and rear rings have the same oval style base (as opposed to STD mounts, which have a front ring with a similar dovetail bottom, but the rear ring has a different clamp base).  

 

Redfield Frontier Groove rings: Each Frontier base has a built-in top groove and two rectangular raised features.  The Redfield Frontier rings have a side thumbwheel that is used to clamp the rings onto the groove of the base.  The base of the rings therefore straddle the rectangular features on the base and the cross screw goes in between the rectangular features (sort of like a Picatinny rail).  Redfield Frontier Groove rings are needed to fit on Redfield Frontier bases. 

 

Quick Release style mounts: Leupold style bases that have a round hole for each ring and a lever on the side that locks in the ring.  The Leupold style Quick Release rings have round slotted projections of the bottoms which fit through the round base holes and lock into place with the quick release lever.  Not to be confused with Weaver style Quick Release rings (which have a cross clamp base with a knurled thumb screw that can be quickly unscrewed).

 

Redfield Swing-Over Rings: Similar to Weaver pivot rings but not necessarily compatible with Weaver pivot bases, one side of the base of the rings is held by a pivot point on the scope base, the other side of the base of the rings snaps over the edge of the scope base with a spring retainer, therefore, the scope can be tipped off to the side on the pivot points to use the iron sights when needed, previously called Quick-Switch by Redfield.