For me, the 6.5 Grendel involvement is a new thing; the logical offshoot of a distant fascination for however long the chambering has been a topic of discussion here on The 'Hide. My interest has hovered over the point of stepping into actual participation, dependent on perceived need and this availability we're all talking about here.
A tipping point was reached when A) I realized that my desire for an AR-based 6.5 did not really require that 6.5 to be a .260 (or 6.5CM), and B) an affordable upper became available chambered for the round. This latter eliminated the need for a costly AR-10 platform, and allowed me to employ my existing AR-15 lower. That was no small difference, transforming the involvement into something I, and perhaps many others here, could achieve without such a huge outlay as an AR-10 system would necessarily entail.
In the past, I've tried to involve the new shooter in my own process, as a means to help them implement decisions and steps similar to my own.
My path started with purchasing an AR Stoner 20" 1:8" Heavy SS Barreled 6.5 Grendel Upper. Having recently bought an AR Stoner .223 Wylde 16" 1:7" Upper and being quite pleased with it, I was prepared to take the chance on an economical implement such as this. The 20" Upper looks to be well made. Several experiences, by myself an others with this provider's barrels has encouraged my faith in taking this chance. They shoot.
Being me, and therefore not content with first steps, I also spied another
AR Stoner 6.5 Grendel barrel, 24" 1:8*, heavy SS in nature. I figured that it warranted serving as the central figure in the build of a complete Upper. I have built an Upper before, with emphasis on economy, literally choosing the cheapest example of each component as available (then) from Amazon, something that's no longer possible thanks to Amazon's corporate virtue signaling.
I had gotten kinda lucky with that process; there being no guarantee that such an approach would be trouble free. Recognizing such, I decided that maybe an approach that limited the rest of the components to a single source, and the same source as both the barrel and the other Upper, could render the same degree of compatibility. This appears to have been the case here.
I chose a stripped receiver/handguard (15") combination which integrates the two separate components into
a single, nearly seamless unit. Being a billet design, it has somewhat different styling, and does not offer a forward assist feature (an deficiency I never noticed until I held it in my hand. Oh, well...; I'm sure I'll be learning new things on the subject...). Anyhoo, it looks nice...
I chose the M2 (A2) flash hider, stainless, along with a stainless crush washer. A Melonited gas tube and a black mini gas block compose the gas system, and an
AR Stoner 6.5 Grendel Type 2 BCG assembly essentially complete the component choices.
The assembly process began by employing the Wheeler Upper Lapping kit, the work of 5-10 minutes, driven by a hand drill. I then applied anti-seize to the threads inserted the barrel and torqued/untorqued the barrel nut twice. I then applied Loc-Tite Red (271) to the barrel extension, inserted it into the upper, and torqued it for a third and final time, to 40ft/lb of force.
This sequence of steps is intended to achieve two things. The thrice torqued barrel nut is intended to burnish/peen the Barrel Nut/Upper threads to ensure more positive thread contact. The application of the Loc-Tite Red to the barrel extension is an effort to bed the barrel and receiver together; several Internet sources suggest this can enhance accuracy. I'm no expert on these subjects, but I found the anecdotal evidence to be persuasive.
This all took place about 24 hours ago. Since then, I have assiduously avoided handling the assembly while the Loc-Tite (I'm guessing) cures. I may wait some more before proceeding with the completion of the Upper. It's probably all unnecessary overkill, but I'm doing it anyway. Once the barrel was installed, I quickly trial fitted the gas block and handguard to see about clearances, and they are very satisfactory.
More to follow...
Greg