I made the following changes to my MP10-
- Replaced the over sized gas block
- Replaced the over sized muzzle device
- Installed a Lancer low DPMS carbon fiber rifle length free float tube
- Installed an SSA trigger
- Installed a Magpul buttstock with a thick recoil pad
- Installed a Magpul grip
The MP10 wil short stroke with mil spec ammo. Use commercial 308 ammo.
The gas key hits the lower where the receiver extension screws in hard enough to damage it. I suspect this happens because the buffer is too light, the spring rate is too low and the plastic buffer tip too soft and compresses too much.
It's not due to the rifle being over gassed. I've tried an adjustable gas block, but unless I run it full open, the rifle short strokes, even with commercial 308 ammo.
Mine also needs a new extractor spring.
Sorting out the remaining problems has been put on hold due to time constraints and ammo shortages.
Reports indicate the MP10 gets good accuracy with the plastic tipped Hornady 168 grain ammo.