I'm selling my 10mm ar to help fund my new rifle for elk season, this thing has hardly any rounds through it. Lower Cav arms mkII Hahn grease gun mag block 2 mags with pouch and loader. Wolff extra power spring and buffer Dmps parts kit Upper Delta company arms smoothside a3 10mm gas op upper with smooth free float tube 10mm bolt with rra carrier Bcm charging handle Holds 36 rounds of 10mm, not 100% reliable with the grease gun mags, but works for me. You could also try the oly mags, but they weren't my cup of tea I'm asking 950$ for the whole thing but will sell the upper with mags and block for 700 shipped. Will ship whole gun to your FFL, or FTF in seattle area. Only trades are glock 22, 21, 20 or usp 40. Might consider a nice garand or 1903. Will also swap barrel and bolt for 5.56 barrel and bolt, just no HBARs As far as the loads it likes, HSM will cycle but i have had short strokes, my reloads of 155gr and 10.5 gr blue dot ran like a champ with almost no recoil. This think will generate some serious velocity if you handload, my thinking was a 135gr zipping around 1800-2000fps.