In StockSave 10%
CMMG Barrel 5.7X28mm 8" Black AR Rifles - 57D88C3
Sold byPalmetto State Armory•Posted May 18, 2026
Compare prices for CMMG AR-15 Barrel 5.7x28mm FN 8" Medium Contour 1:9" Twist Nitride$458.99
$509.99
You save $51.00 (10% off)
Price and stock data refresh continuously from Palmetto State Armory.
Deal Summary
- Currently in stock.
- Caliber: 5.7x28
- Category: parts
- UPC: 810097502406
- SKU: 516551636835
- Brand: Cmmg
Price History
Deal Details
The 8, 5.7x28mm Barrel and BCG Kit is perfect for building an AR pistol or SBR in 5.7x28mm using CMMG's patented Radial Delayed Blowback operating system. Unlike typical direct blowback systems, Radial Delayed Blowback not only reduces the weight in your BCG but it results in less felt recoil than a straight blowback system and still provides essential features like last round bolt hold open. CMMG's 5.7x28mm Barrel and Bolt Kits are designed to be assembled into a Mk4/mil-spec AR15 upper and wor
Other Offers for This Product
Active offers from your catalog for CMMG AR-15 Barrel 5.7x28mm FN 8" Medium Contour 1:9" Twist Nitride.
Comparing 5 retailers carrying this product
Lowest Price: $381.89
Highest Price: $458.99
You Save: $77.10
Avg Discount: 8% off
CMMG Barrel and BCG Kit 57D88C3, 5.7X28MM, 8 in Barrel, Fits AR Rifles, Black 57D88C3
CmmgHinterland OutfittersSKU/UPC: 204809
$381.89
View at Hinterland Outfitters
CMMG AR-15 Barrel 5.7x28mm FN 8" Medium Contour 1:9" Twist Nitride
CmmgMidwayUSASKU/UPC: 461437
$393.99
View at MidwayUSA
CMMG Barrel and BCG Kit 5.7X28MM 8 Barrel Fits AR Rifles
CmmgGrabAGunSKU/UPC: GAG_CMMG57D88C3
$406.99$474.95Save 14%
View at GrabAGun
CMMG Barrel and BCG Kit 8in 4140CM SBN 57 x 28mm
CmmgOptics PlanetSKU/UPC: 2CM-ATB-CP11-57D88C3
$419.99$499.95Save 16%
View at Optics PlanetCMMG Barrel 5.7X28mm 8" Black AR Rifles - 57D88C3
CmmgPalmetto State ArmorySKU/UPC: 516551636835
$458.99$509.99Save 10%
View at Palmetto State Armory