The 6.8mm SPC was designed to fit through a M4 Carbine (AR15), at a min you would need a different barrel, bolt and magazine. Most just build a complete upper in caliber and just need different hi cap mags. You can use the 5.56 mags but will only get 5-6 rounds in for realibilty reasons (problem is the grooves on the sides of the mags) All other AR15 parts will work with it (same with the 6.5 Grendel). Steve Holland out of 5th SFGA was the developer along with folks down at AMU (Army Marksmanship Unit, Ft Benning) and Remington. I also worked with Steve on the development of the SPR (Mk12) and the Barrett M82 chambering a 25mm cartridge.Thanks, this site is excellent for the novice gunsmith...I noticed in my DPMS catalog that the receivers have a different part numbers. I already have a S&W MP 15 in 5.56 and a Savage 10fp-le1 chambered in .308. Thinking of going to the .308 just for the extra power. Anyone have on in 6.8 SPC, this is designed to work in the stock AR frame, right....Mi Not including Bolt and Mags,or is that wrong...
Im still scratching my head over the 6.8 SPC.
Yeah, I know, same platform, just change uppers.
Why not an AR10 in something oh like .243?
100 grain bullet at 2900-3000 for reach out and smack something or for more umph, 7mm08 in a rifle companies already make?
Oh well. Just something I think about at times.
I know and understand all that, but cant help feeling it is reinventing the wheel. Cant help feel it's just another caliber and another upper when a proven system was there, just in need of someone to say it was time to standardize like the AR15 manufacturers finally did not that long ago so now different company's different AR15 parts are compatable. And as for lighter and smaller, if they are reissuing or guys are going back to the M14 for more firepower, why not the AR10 when the drills and ergonomics for it and the AR15 are very similar?The purpose of the 6.8 SPC/6.5 Grendel is to give the AR15 owner more energy on target without buying a new rifle. The .243/7-08 require the AR10 platform which is a larger (none compatible w/AR15) rifle reciever and upper. Since the AR10 is non standard between companies, parts are not interchangable like with the smaller AR15. The AR15 is lighter, easier to carry, quicker into action and has more parts/accessories to custom tune your rifle for your needs.