Hi guys. Need a hand. No matter how much I read, I'm afraid I'm going to screw this up. I have a DPMS LR-65 (6.5 Creedmoor) that I love. The only upgrade I've done is Geissele 2-stage. Shoots like a dream. However, it still has the origina A2 buttstock and I want to put a collapsible Vltor...