MPA chassis ? on barrel contour

[bgavin]

What barrel contour is the largest you can put in a mpa ba chassis?

I know a 26 inch m24 will fit but wanted to go 28 inches and m24 only goes to 26 inches.

Thanks

 

[One1Bravo]

MTU I believe
ETA:

 

[47guy]

i have a light varmint on one of mine and its a tight fit.

 

[nfoley]

When I was using the MPA I had to shave some material to get a Benchmark MTU to fit.

 

[bgavin]

Thanks guys

 

[KPK]

If you want longer go heavy palma. Outta fit.

 

[Sheldon N]

I run heavy varmint and MTU in both of my MPA chassis. It's a case by case situation based on how everything lines up. For mine there was plenty of clearance on the NV bridge but I had a bit of contact on the lower ribs of the chassis. It's super easy to clearance so that things free float. A piece of sandpaper wrapped around some PVC pipe or a dowel and sand away until you can slide a piece of paper between chassis and barrel. The chassis is aluminum so material comes off quite easily. When you're done use a black sharpie to color the area where you sanded so it doesn't stand out under the barrel.

 

[bgavin]

Thanks

 

[b6graham]

i run a heavy varmint that was meant to be finished at 31" but i finished it at 27". it fits with the bridge. YMMV

 

[ChiefW]

They changed the barrel channel cut in January. In 2018 the max barrel was M24 or 1.1” at 10” in front of the action. 2019 actions have the cut for full bull all the way out. At least thats what They told me this week.

 

[b6graham]

They changed the barrel channel cut in January. In 2018 the max barrel was M24 or 1.1” at 10” in front of the action. 2019 actions have the cut for full bull all the way out. At least thats what They told me this week.

Weird mines one of the first with the lug lock (dont even use it) and inclinometer and I have no issues

 

[Vandy321]

Bumping an old thread...first MPA...how close it too close to chassis...it looks to the eye like that rear most rib is touching, but a piece of paper will slide in...good, or sand a bit?