Proof Research 6mm ARC AR-Type AR-15 Barrel - Rifle Length - Stainless Steel - .750" - 16"
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Proof Research
Overview
The Proof Research 6mm ARC AR-Type AR-15 Barrel is a 16-inch barrel designed for optimal performance with the 6mm ARC cartridge. Featuring a SPR profile and a 1:7.5 twist rate, this barrel ensures stability and accuracy, making it well-suited for precision shooting. The rifle-length gas system promotes smoother cycling, which is beneficial for maintaining consistent operation in your builds. This barrel is commonly found in precision-oriented setups that take advantage of the 6mm ARC's capabilities.
Specifications
Proof Research 6mm ARC AR-Type AR-15 Barrel - Rifle Length - Stainless Steel - .750" - 16"
Available Merchants(6)
Prices checked
Price Alert
Build history on GunPartPicker
Builders have added the Proof Research 6mm ARC AR-Type AR-15 Barrel - Rifle Length - Stainless Steel - .750" - 16" to their builds on GunPartPicker. Since April 2026, it ranks #159 of the 1,042 barrels builders have added. Builds with this barrel are nearly all chambered in 6mm ARC, nearly all on rifle-length gas, and nearly all AR-15.
Availability is good: it was in stock at one retailer or another nearly every time we checked in October 2026, and today 3 of the 6 retailers we track have it in stock. Prices barely moved in October 2026, holding around $649, with no real sale all month. Buying today, the lowest price is $649 at Optics Planet, which matches the best price we saw in October.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 37 retailers
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Read the guide: AR-15 Barrel Length & Brand Report →Check it against the live catalog:
Frequently Built With
The part most often added in each category by the builds that include this one
Wilson Combat AR-15 Billet Upper Receiver
Geissele Automatics MK16 15" Super Modular Rail M-LOK Ddc
Daniel Defense Complete Bolt/carrier Group, M16
Wilson Combat Wc-15 Billet Lower Receiver
Radian Weapons AR-15 Raptor-SD Ambidextrous Charging Handle OD Green
Geissele Automatics Super Semi-Automatic Enhanced SSA-E Two Stage AR-15 Trigger
Builds Featuring This Part
See all builds →Builds in the community that include the Proof Research 6mm Arc Ar-Type Ar-15 Barrel - Rifle Length - Stainless Steel - .750" - 16"
| Build | Parts | Total |
|---|---|---|
 | 12 | $1652.92 |
 | 6 | $3850.88 |
 | 19 | $1342.98 |
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