Suppressor for Grendel came in

[Variable]

Back at the beginning — I wanna say 2004 —AA's sniper-style rifles were threaded 3/4x28. It would have been their GDMR model. Bill A. did this to have as much meat at the muzzle as possible.

Except----- If you were a stingy and wise grasshopper, you could order the 19.5" Hunter upper with the same barrel. Then build your own GDMR for less money with the rail of your choice.

[motoxxx_ryder]

There was no thread pitch standard for AR10's, and still isn't to this day. There certainly wasn't and isn't a standard thread pitch for larger bore calibers in the AR15. The 6.8 uses all sorts of different thread pitches from maker to maker, ranging from 1/2x36 for Model 1 Sales, to 9/16x24, to 5/8x24.

thats because they need to standardize the 308 cal AR platform first LOL. theres what AR 10, and then the SR 25 which parts are not interchangeable. Someone needs to cave and create a benchmark standard for the platform.

[mwilkins]

Picked up a new TBAC 5/8x24 CB brake today. Barrel and parts go off in the mail tomorrow. should have it all back in about a week.

[LRRPF52]

thats because they need to standardize the 308 cal AR platform first LOL. theres what AR 10, and then the SR 25 which parts are not interchangeable. Someone needs to cave and create a benchmark standard for the platform.

There is much more than that. It basically would take a funded paper to document all the AR10 variations on the market. I did a thread on it on AR15.com, covering most offerings from 1955 to present. There are around 40 different AR10 and AR10-type rifles that have been manufactured, many of which have their own unique data sets, even within manufacturers.

For example, DPMS has no less than 3 different upper receiver rail heights, and a new GII design that departs entirely from the LR-308.
ArmaLite Inc. has several different receiver types, starting with no forward assist, the FA, then a receiver set that will take SR25 mags, whereas their first receiver design took modified M14 mags, which have undergone at least 3 generations of evolution themselves.
At least half of the 40 different AR10-type rifles do not share receiver interchangeability, pin compatibility, and other important considerations with the mechanical engineering of the bolt carrier travel and deconfliction with the receiver extension threads.

Charge handles, magazines, upper receiver threads, ejection port doors, extension tubes, buffers, recoil springs, gas tube lengths, operating systems, and many other aspects of the guns are all over the map. There isn't and never will be a standard for the "AR10" or derivatives of that design.

The new wave of AR 308 economy receiver sets only exacerbates this problem, and many of the build projects are non-functional from the start, for a number of reasons. They usually boil down to parts that were never meant to work together, defective parts, and really bad chamber reaming on barrels.

[motoxxx_ryder]

There is much more than that. It basically would take a funded paper to document all the AR10 variations on the market. I did a thread on it on AR15.com, covering most offerings from 1955 to present. There are around 40 different AR10 and AR10-type rifles that have been manufactured, many of which have their own unique data sets, even within manufacturers.

For example, DPMS has no less than 3 different upper receiver rail heights, and a new GII design that departs entirely from the LR-308.
ArmaLite Inc. has several different receiver types, starting with no forward assist, the FA, then a receiver set that will take SR25 mags, whereas their first receiver design took modified M14 mags, which have undergone at least 3 generations of evolution themselves.
At least half of the 40 different AR10-type rifles do not share receiver interchangeability, pin compatibility, and other important considerations with the mechanical engineering of the bolt carrier travel and deconfliction with the receiver extension threads.

Charge handles, magazines, upper receiver threads, ejection port doors, extension tubes, buffers, recoil springs, gas tube lengths, operating systems, and many other aspects of the guns are all over the map. There isn't and never will be a standard for the "AR10" or derivatives of that design.

The new wave of AR 308 economy receiver sets only exacerbates this problem, and many of the build projects are non-functional from the start, for a number of reasons. They usually boil down to parts that were never meant to work together, defective parts, and really bad chamber reaming on barrels.

And this is why i wont build a 308 AR until there is SOME sort of baseline for it like the Ar 15. id rather pay a bit extra for a nice build then go through the headaches of finding out i have a sr10 bolt on a DPMS barrel with a ar 10 trigger...

[mwilkins]

Barrel came in today from my smith. Looks good. Now I just have to put everything back together. Should be ready for rounds down the tube suppressed by Saturday.