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Product information
Overview
CMMG BBL AND BCG KIT 8" 5.7X28MM
Description
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 work with either a CMMG Mk57 lower receiver or Mk4/AR15 mil-spec lower receiver (when using CMMG 5.7 AR Conversion Magazines).
Specifications
| Manufacturer | CMMG |
|---|---|
| SKU | RSR|CMMG57D88C3 |
| UPC | 810097502406 |
| UPC | 810097502406 |
| Manufacturer | CMMG |
| Manufacturer Part Number | 57D88C3 |
| Barrel Length | 8" |
| Caliber/Gauge | 5.7 x 28 mm |
| Color | Black |
| Length | 17.4000 |
| Product Type | Barrel |
| Shipping Weight | 1.775 |
| Sights | No |
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Questions & answers
How will this item ship?
Eligible non-firearm items may ship to an address that meets shipping rules, or you can choose local pickup at STX Bullseye when available. Restrictions can apply by product and destination.
Does this require an FFL transfer?
This listing does not require an FFL transfer. Firearm receivers and other regulated items are labeled separately when FFL transfer is required.
What if I have compatibility questions?
Contact STX Bullseye before purchase if you need help confirming fitment, caliber, or mount compatibility. Staff can review the listing details with you.
How do I contact STX Bullseye?
Call (956) 314-0879 or visit the Contact page. Store hours and location details are listed on Contact and About.
Answers are general store information and are not personalized legal advice.