so you got me thinkin, maybe ill try it again, maybe i screwed up. so just grabbed it, and tryed again. one swivel will fit one wont. both out of the same box both new. so ok yahoo i can put the sling on. the second one came with the picatinny rail clamp,clamp it on and it wont lock up tight on the rail. ill not buy CAA products again cheep crap