u/Ky_Scott88

Image 1 — SD barrel swap
Image 2 — SD barrel swap
▲ 5 r/MP5

SD barrel swap

I recently swapped in a rcm ported barrel on my ap5sd. I used the 3d printed fixture I found on here. The bolt gap that I measured was .017” (verified by a second person) but the gun will not function unless I manually load a round on the bolt and assemble it. By looking at it now I feel like I pressed the barrel too far. I just don’t understand how my bolt gap is in range. Before I remove the pin and
press out the barrel, is there something else I could be missing?

u/Ky_Scott88 — 2 days ago