Got it, I seen how it works with the groove after I was able to secure the stock because the volley back sight was intact. I put a few rounds down range after it was all together using PPu 175's in preparation for a nostalgia event coming up this week. It printed about 3" high @100 yds. In a very nice group. Pretty easy shooting with light recoil and good sight radius but haven't tried it with a sling yet.