New to the forum. Just wanted to post results from all the info I gathered from this thread. All of you have been a great help in getting my Masada running in top form. I've recently installed SHS 13:1 gears, corrected AOE with rubber washers, and installed a red element piston(which is a great fit in the GB, no binding whatsoever). With an SHS M100 I am shooting consistently in the low 350 fps range...perfect. However, I'm running into some feeding issues....mags not keeping up or not feeding correctly. From what I've read, i might have to modify or replace the tappet plate and/or sand
