Should be a strait swap. One thing you may do is check the extractor, it may need a bit of polish/shaping. See threads on the forum or Johnny's reloading bench for more info on this. Running dummy rounds through your rig will help identify problems like that.
The bolt should be a match for the Grendel barrel, most modern standard production barrels will work but some of the early barrels need a different bolt for things to work correctly. It's a bit confusing but SAMMI .136 or type 2 bolt with type 2 barrel is pretty standard now.
The bolt should be a match for the Grendel barrel, most modern standard production barrels will work but some of the early barrels need a different bolt for things to work correctly. It's a bit confusing but SAMMI .136 or type 2 bolt with type 2 barrel is pretty standard now.