Scope Base ID Please

[HammBone]

Bought another rifle. It came with scope bases, but no scope and no irons. I'm going to put a Weaver K4 on it and can't figure out these bases. What are they? I've included a photo comparing them to Weaver rings.

[Lurching Hail]

In the 4438 photo, it looks like part of that ring is missing ... the part that clamps to the base.

[Super Trooper]

My guess is 3/8 dovetail bases.

[HammBone]

In the 4438 photo, it looks like part of that ring is missing ... the part that clamps to the base.

Correct. I just held the top part up to show the profile difference.

[HammBone]

My guess is 3/8 dovetail bases.

OK. I googled a bit and found them referenced as being common for rimfire rifles. Will see what Cabela's has after work this evening. Thanks!

[Mark Davis]

The weaver style ring in your hand is sized for centerfire, 7/8" wide.
The bases installed on your rifle are sized for rimfire, 3/8" wide.
So you need either a wider base installed on the rifle, or a set of rings with a narrower clamp on the bottom.

If it was my problem, the wider base on the rifle is first choice. because I like robust scope mounts.

[Palladius]

They look like the standard 3/8" dovetail that I usually find on rimfires. There should be a ton of scope rings out there for them. A lot of decent rimfire scope come with the 3/8" rings.  If it's a 10/22 I would pick up a picatinny rail and mounts. There are some good reasonable options. I've started to standardize on that system though.

Rail I just put on a 10/22
Leapers UTG PRO Made in USA Ruger 10/22 Picatinny Rail Mount https://www.amazon.com/dp/B018H9260C/ref=cm_sw_r_cp_api_iG2GBbPHH6P54

Rings for the same setup
Monstrum Tactical 1" Scope Ring Set, Medium Profile, with Picatinny/Weaver Rail Mount https://www.amazon.com/dp/B00KWI12C0/ref=cm_sw_r_cp_api_zF2GBbBNTTCFY

There's a great Simmons scope on Amazon for 40$.
Simmons 511039 3 - 9 x 32mm .22 Mag(R) Matte Black Riflescope https://www.amazon.com/dp/B000KOSB34/ref=cm_sw_r_cp_api_UE2GBb8M0VCHK

[HammBone]

They look like the standard 3/8" dovetail that I usually find on rimfires. There should be a ton of scope rings out there for them. A lot of decent rimfire scope come with the 3/8" rings.  If it's a 10/22 I would pick up a picatinny rail and mounts. There are some good reasonable options. I've started to standardize on that system though.

Thanks for the reply. You are correct and I was able to find some rings that fit. It is a seldom seen rifle these days that was discontinued years ago, a Thompson/Center R-55 Benchmark. Every part of it is very difficult or impossible to find so I suspected the same for its scope mounting system. Thankfully that was easy. I am going to open up another thread about the rifle to see what information I can gather from this knowledgeable group.