Barrett M82A1 .416 Barrett Caliber Conversion Kits

The famous Barrett M82A1 rifle, chambered in .50BMG (12.7x99mm), has been in use by militaries around the world since its introduction in 1982. It is also quite popular with civilian shooters in the United States – those that can afford the $10,000 price tag, that is.

Barrett M82A1 Rifle

It has since been chambered in .416 Barrett (10.6x83mm), which was developed in 2005 and employed mainly in the Barrett M99 single-shot rifle. Barrett has now introduced a conversion kit which will enable owners of the .50 BMG M82s and M107s to fire .416 Barrett. The price is $3,000.

Barrett .416 Caliber Conversion Kit

The kit comes with, according to Barrett, “everything you need to convert your Model 82A1 .50 BMG rifle into a rifle chambered for .416 Barrett: Barrel assembly, battery bumper, muzzle brake, muzzle brake nut, and one 10 round magazine.” However, a complete bolt assembly is also in the photograph. Since .50BMG and .416 Barrett have nearly identical base diameters (.804″ and .797″, respectively), it would not seem necessary to use a different bolt.

Additional magazines are available for $155.



Andrew Tuohy

Andrew Tuohy was a Navy Corpsman with the 5th Marine Regiment. He makes a living by producing written and visual content within the firearm industry, and he also teaches carbine courses. He prefers elegant weapons for a more civilized age, and regularly posts at Vuurwapen Blog.


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  • I think that is the “battery bumper” not a bolt assembly. But not being a Barrett owner and only having seen on broken down once, I am not 100% sure.

    • Andrew (European Correspondent)

      MattW, I am not a Barrett expert either, so I consulted the parts diagram on their website, and it seemed to correspond with the bolt. The battery bumper looked quite different.

  • Nater

    I think it’s cool and all for people that have the misfortune of living somewhere that bans the big .50, but I don’t see the point for two many other folks. If memory serves me, the M82/M107 rifles are 2-3MOA guns. They’re probably not the best choice when shooting requires a cartridge that is even more accurate at very long ranges than the .50BMG, because those are very long ranges indeed. Likely outside the M82’s useful engagement range for enemy personnel. Perhaps I am wrong., maybe people want to shoot 36″ gongs at super long range. Still, that .416 Barrett is an awful lot more expensive than .50BMG. Maybe it’s closer on match grade rounds, I don’t own a fifty so I don’t keep up on the prices for such things.

  • Good move, tried pulling it up but was having issues with their website on my phone.

  • Komrad

    Cool. I bet cali shooters will like it, those that have 13 grand to burn that is.

  • JessJ

    I would presume the bolt is required for proper headspace since they are giving you a complete barrel/chamber assembly.

  • Lance

    Pay threw the nose again Barrets are a rich mans gun.

  • Michael

    It is still a semi-auto with a detachable magazine, thus it is still not available for purchase in Cali. It would need to have a fixed magazine for it to me legal.

  • howlingcoyote

    Just the gun to hunt wild hogs in Texas with!

  • Sid

    I once wasted a precious half-hour of my life watching the West Coast Customs team design and install a set of custom wheels on an Enzo. I really could not tell the difference in the original set of wheels and the new custom set. But it did cost a lot of money.

    That is what I take away from this. If you own a really unbelievably expensive gun, then the same company now offers to sell you a new kit (also really unbelievably expensive) to fire a somewhat different round. You know, in case you are having trouble with your .50 BMG over penetrating when you take down herds of grizzly bears.

    I am not envious not trying to be petty. If someone has the money to buy a civilian Barrett, then I am happy for them. Truly. But this kit seems to be a waste of time. The .416 is not so much different from the .50 BMG. I mean, if you are doing anti-material work at the 2 mile range, you could just use the same bullet for anti-personnel work.

    Not trying to be mean, but is anyone going to buy this kit?

  • armed_partisan

    A conversion kit that costs almost as much as a Sako TRG-42 in .338 Lapua? Please.

  • KEN

    Its a bolt. I have the military TM.