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Shorter upper & lower receivers, & thus shorter bolt carrier.  Look at the locations of the rear take down pin & safety on the POF & Ruger vs the SIG:

https://www.sigsauer.com/media/catalog/product/cache/a3db8ca85b9f26a85c601248a3f4f74b/r/7/r716i-16b-trd-right-web.jpg

https://i.imgur.com/aivhU2P.jpg

(Cheers to kel for Photoshopping those two.)

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@backbencher

Then may the fuck be upon me. I will find a G2 some day for the right price and refit it to .260.  I made out like a bandit when freedom group went under. I bought a lot of parts when they were with the  liquidation company and built a glorious 28 inch .960 barreled .308. Same company that liquidated the American 55X Sig line.

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Ok I can see if the upper is long into the handguard (look at where the handguard attaches), and the lower is longer out the back (look at the buffer tube interface) ... And the bcg is longer (conceptually I know those are heavy steel things) ...

I could see that the receiver and bcg are a big driver in the weight difference I presented, maybe more than the barrel?  Maybe the barrel isn't a driver after all.

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That’s where I’m at with it. I own a couple of .308 AR’s and an FAL just because I have a metric fuck ton of .308 but I’m not kidding myself about the limits of its performance.

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Fair point.

I guess, in my pea brain, when I think of a long-range caliber, I think of things that go past the effective range of 5.56.

77gr 5.56 is plenty good out to 600y+, so I want whatever the "next" stage is to be 600y-1000y+. Hence my immediate jump to calibers like .338 or 6.5.

I forget sometimes that "better" calibers for various jobs exist inside of 600y.

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6.5 is going to retain more energy at range. Higher BC translates to less drop and (most importantly) less wind drift increasing hit probability.

If I’m pushing from 400 to 1k regularly I’ll take a 6.5 any day of the week.

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fwiw, my POF rogue just passed 2500rds with zero failures

been shooting 168gr exclusively just because I got a metric crap ton of it

scoped, fully loaded 20rd magazine it weighs right at flat 9lbs

I did add some weight to mine with the Kaw valley linear comp (still not sure that does anything at all other than add weight, but wishful thinking and all) and a different stock, but it sure is a handy little rifle

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Bushmaster BAR-10 modified A2 20" with an Ace skeleton stock.

https://www.ar15.com/media/mediaFiles/60034/Bushmasters_jpg-2517283.JPG


All the AR's pictured are old Bushmasters and mostly oddballs except for the top A2 with an A3 carry handle. The RRA you mentioned (LAR-8) is actually the grandson of the Bushmaster BAR-10 and was initially a RRA design that was licensed to Bushmaster. The "modification" designated a change to the bolt in later models and the rifle will say BAR-10 MOD on the side. The rifle was produced for a very short time (along with the other oddballs). Due to the fact in order to use the FN-FAL mags, one of the locking lugs was removed from the bolt. Many at the time thought that was a weak point and as time went on, there were reports that the bolts were in fact breaking. This much was true but it was the tail of the bolt, not the bolt face. There was a score mark 1/2" up from the end of the tail where it would snap off and also poor heat treatment. The broken tail section didn't effect the rifle but the damage was done. The score was removed and properly heat treated in the later models but due to the high cost of the rifle and the rumors of the rifles breaking, they dropped it after a year or so and released the license back to RRA who sat on it for a few years before re-releasing it as the LAR-8. Many of the parts are interchangeable. The benefit of using the FN-FAL mags were at the time they were only about $5.00 new in packaging for pre 94's and plentiful as opposed to Armalites that were like 6X that.

If you're interested in more history from the ABC era, the M-forgery on the bottom has a factory camouflage pattern on it. This one has the dessert but they made an Arctic (probably the rarest) and a hardwood. It was proprietary in that you couldn't just order the furniture. If you needed to replace a broken hand guard per say, you would need to send the broken one in. These to were short lived and discontinued. After a couple years Bushmaster decided to clean out the warehouse and offered odds and ends for sale so I picked up an extra bolt assembly for the 308 (just to have) and a set of the hand guards for the third oddball.

The stand alone upper is another oddity. It's in .22LR. Again, only made for a very short time. It was made when the only options you had to use .22's in your AR was to get a conversion kit like a Ciener conversion kit. I guess they were "okay" but not all that much by way of accuracy. The upper was built for .22's by way of barrel twist and such. It is extremely accurate. I use it primarily on the carbine hence the hand guard change.

For the time, Bushmaster (pre-Cerebus, now Wyndham weaponry) was pretty innovated and pushed things more so then most. Here's a link to an old catalog where some of these are found if you're into specs.

2004 catalog

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Ruger spokesman was hauled in front of batshit liberals in Congress and asked about ATF.

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Be specific asked if they would support abolishing the ATF. Somehow not admitting that openly makes them anti freedom. People are so dumb.