I'm a newbie to the group.
I found this thread on the nickel boron coated BCG from GB and knew immediately many of you had purchased the same BCG I had purchased on GB.
I have built 2 AR's but never built an LR308. This was my first attempt at building an upper from scratch.
This build includes a DPMS lower with a Timney drop in trigger (new AR10 version) with a fixed A2 stock and Magpul PMags.
The upper is also DPMS with a 20" stainless Ranier Arms select barrel and JP Enterprises Bennie Cooley muzzle brake.
PRI adjustable gas block and Troy TRX Extreme hand guard\rail.
The BCG was the last part on backorder and I finally gave in and purchased the NI-Boron BCG on gunbroker.
I was a apprehensive about a trip to the range before I checked headspace, so I took the LR308 to a local DFW gun shop for a go-no go test. The gun shop did not remove the extractor from the bolt before running the test.
A long story short- the gun shop ran the go-no go test and dclared the LR308\NI Boron to have a headspace issue.
I ordered a Forester single field guage and rand my own no-go test, but I first removed the extractor and the firing pin.
The Field Guage did not close. It is a NO GO.
I next took a spent, empty Win .308 case and inserted it into the chamber. I closed the bolt and everything closed and locked up. I removed the magazine and used a flashlight to visually confirms the bolt lugs had turned, mated and locked with the barrel extension lugs. Everything looked fine.
Do I need to do further testing before I go to the range?
To make matters worse... Today I received a package from Midway. My new DPMS BCG arrived.
I quickly traded the nickel boron coated BCG for the black phosphate coated DPMS BCG to do a comparison.
The Black DPMS seemed to mate, turn and lock up with the barrel extension lugs much easier-
However, the Nickel Boron coating is a definite plus. The NI-B BCG seems slick and slides much easier and with less resistance. I am not saying a well oiled Black Phosphte BCG would not work equally well- But the NI-B BCG was noticeably easier to cycle through the upper receiver.
I am considering selling the Black Phosphate DPMS BCG on GB.
But, I'm hesitant to do that until I determine that the NI-B will work flawlessly.
Has anyone had any issues with the NI-B BCG at the range?
Do I need to keep testing headspace?
Your thoughts and comments are appreciated.
