Upper Question

[montana]

Ok. I talked with a cop friend, he already has all the tools and can build it that way.

So looked over PF's site and settled on a Criterion barrel.

Here is what I came out with:

6.5 Grendel Criterion Barrel: 6.5 Grendel Criterion Barrel
• Options: 16 inch
• Options: Add Superlative Arms Low Profile Adjustable Gas Block (+$90.00)
• Options: Add Mid Length Gas Tube (+$12.00)
• Options: Dimple Barrel for Standard Low Profile Gas Block (+$20.00)

Missing anything?

Dimpling can have accuracy issues if the set screw is tightened down too tight. 20 inch pounds is recommended with the set screw in the dimple, "with this type of gas block" instead of the standard 25" pounds.. Clamp type is preferable if accuracy is paramount. I prefer the SLR adj gas block, which is easier to service and adjust IMO. All adjustable gas blocks will leak more gas, "than a standard gas block" if the journal size is of equal quality. Remember, an adjustable gas block can only restrict the barrel's port gas, it cannot increase it.. The quality of the BCG and gas system with the interaction of the buffer spring-BCG weight, will all come into play with regard to reliability...