In Stock
Type
parts
Last Seen
May 20, 2026
Proof Research AR Style Barrel 6mm ARC 18 Stainless Threaded Rifle Length
Sold byShooting Surplus•Posted May 20, 2026
Compare prices for Proof Research AR-15 Barrel 6mm ARC 18" Heavy Contour 1:7.5" Twist Stainless$649.00
Price and stock data refresh continuously from Shooting Surplus.
Deal Summary
- Currently in stock.
- Category: parts
- UPC: 843068128688
- SKU: 126660
- Brand: Proof Research
Price History
Deal Details
The Proof Research 128688 AR-Style Barrel for the 6mm ARC delivers precision engineering in a stainless steel finish with rifle-length profile, offering a reliable foundation for AR-platform builds. This 18-inch barrel combines high-strength stainless construction with a threaded muzzle and a .750" gas journal diameter, enabling clean, consistent cycling and easy installation for compatible uppers. Its 1:7.50 twist rate is optimized for a broad range of 6mm ARC projectiles, balancing stability a
Other Offers for This Product
Active offers from your catalog for Proof Research AR-15 Barrel 6mm ARC 18" Heavy Contour 1:7.5" Twist Stainless.
Comparing 7 retailers carrying this product
Lowest Price: $543.38
Highest Price: $649.00
You Save: $105.62
Avg Discount: 4% off
Proof Research 128688 AR-Style Barrel Traditional 6mm ARC 18 AR Platform Stainless Steel Stainless Rifle Length with .750 Gas Journal
Proof ResearchBattleHawk ArmorySKU/UPC: 843068128688
$543.38$749.00Save 27%
View at BattleHawk Armory
Proof Research AR-Style Barrel Stainless 6mm ARC 18 Barrel
Proof ResearchGrabAGunSKU/UPC: GAG_128688-126660
$570.99
View at GrabAGun
Proof Research 128688 AR-Style 6mm ARC 18 in Stainless Steel Finish & Material Length with Threading & .750 in Gas Journal Diameter for AR-Platform, Rifle Barrel
Proof ResearchHinterland OutfittersSKU/UPC: 170113
$572.00
View at Hinterland Outfitters
Proof Research AR-Style 18'' 6mm ARC Stainless Barrel
Proof ResearchAmmunition DepotSKU/UPC: 128688
$580.49
View at Ammunition DepotProof Research AR Style Barrel 6mm ARC 18 Stainless Threaded Rifle Length
Proof ResearchShooting SurplusSKU/UPC: 126660
$649.00
View at Shooting Surplus
Ar-15 6mm Arc Stainless Steel Barrel - 6mm Arc 1-7.5 Twist 18'''' Stainless Steel Barrel
Proof ResearchBrownellsSKU/UPC: 430105958
$649.00
View at Brownells
Proof Research AR-15 Barrel 6mm ARC 18" Heavy Contour 1:7.5" Twist Stainless
Proof ResearchMidwayUSASKU/UPC: 938021
$649.00
View at MidwayUSA