In StockSave 16%
CMMG Barrel and BCG Kit 8in 4140CM SBN 57 x 28mm
Sold byOptics Planet•Posted Apr 27, 2026
Compare prices for CMMG AR-15 Barrel 5.7x28mm FN 8" Medium Contour 1:9" Twist Nitride$419.99
$499.95
You save $79.96 (16% off)
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Deal Summary
- Currently in stock.
- Caliber: 5.7x28
- Category: parts
- UPC: 810097502406
- SKU: 2CM-ATB-CP11-57D88C3
- Brand: Cmmg
Price History
Deal Details
CMMG Barrel and BCG Kit 8in 4140CM SBN 57 x 28mm. 7x28mm Barrel and BCG Kit allows you to build an AR in 5.7x28mm using CMMGs 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. CMMGs 5.7x28mm Barrel and Bolt Kits are designed to be assembled into a mil-spec AR15 Upper and work with either a CMMG Mk57 lower receiver or with a st
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 GrabAGunCMMG 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 Planet
CMMG Barrel 5.7X28mm 8" Black AR Rifles - 57D88C3
CmmgPalmetto State ArmorySKU/UPC: 516551636835
$458.99$509.99Save 10%
View at Palmetto State Armory