I have a pair of Kimber of Oregon scope rings that were mounted on a grooved receiver older model 82 rimfire rifle. They are the lever release Brownells style of scope rings. The screw on one ring had gotten frozen and I snapped the bolt that held the claw for the base. The other ring is fine. I replaced the set with another brand and so these are for sale. $15 and I will ship the good ring and the broken ring for parts by USPS.