Hey guys, I've been gathering parts to assemble my first 308 ar. So far, I have a Tactical Machining upper and lower, DPMS SASS barrel and early next week I should be receiving a dpms 308 specific lpk and chrome bcg complete. I plan to order a Troy trx-lp, 13.8" handguard and had intended to run a Magpul UBR stock. I talked with Clint at heavy buffers and ordered his CAR 10 buffer and spring. In the meantime (today) I got ahold of a PRS stock fir cheap. As the cost of this build is quickly adding up, I think I'll put on hold ordering the ubr stock. As the buffer and spring are already on their way, I'll hold them for when I do go with a ubr. In the meantime, what buffer tube, spring and buffer do I need? I've been looking at Clint's reference chart and am unsure what I need as this 18" barrel is midlength gassed. Can anyone help...