Battle Arms Development XIPHOS001 Xiphos 30+1 16″ Black Barrel, Combat Gray Picatinny Rail Aluminum Receiver, M-LOK Handguard, Black Synthetic Stock, Adj Black Grip
June 12, 2026
Patriot Ordnance Factory 1665 Rogue 308 Win 20+1 12.50″ Black Anodized
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CMMG Barrel and BCG Kit 4140CM SBN Drop in Barrel 5.7 x 28mm 5″ Barrel Black
$448.62
CMMG Barrel and BCG Kit 4140CM SBN Drop in Barrel 5.7 x 28mm 5″ Barrel Black
2 in stock
The 5” 5.7x28mm Barrel and BCG Kit allows you to build an AR 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. CMMG’s 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 standard Mk4/AR-15 lower receiver (when using CMMG 5.7 AR Conversion Magazines).
| UPC | 810097502390 |
|---|---|
| Manufacturer | CMMG |
| Manufacturer Part Number | 57DBC33 |
| Barrel Length | 5" |
| Caliber/Gauge | 5.7 x 28 mm |
| Length | 5" |
| Product Type | Barrel |
| Shipping Weight | 1.485 |
