This is my fitst compounf bow and a friends stepdad gave it to me. Its a Jennings carbon extreme . He fletched the arrows with feathers himself which i thought was cool. It has light up sights and a butthole arrow rest. His words not mine. He has shorter arms than me but within a half hour of his instructions and sight adgustmenent he had me hitting all the arrows in a 6 inch ring and a dead center bullseye but only at 10 yards. Like i said its all new to me. He said i would do better once i get a new string and the draw lenght increased because i couldnt lock my arm. He daid once i get good at that distance to keep incteasing it. My question is the later Jennings carbon extreme have adjustable draw lenght. He said it did. My son and brother have stupid exspensive bows but im happy with this one. I wanna get good enough to show them you dont need to spend a fortune to get the same results with an old bow. Any help is appreciated. Thanks.