The Colt M4 Monolithic SBR (MPN LE6943) is a short-barrel rifle chambered in 5.56mm NATO with an 11.5-inch barrel on Colt’s monolithic upper receiver platform. As a registered NFA short-barrel rifle, this item requires an approved ATF Form 4 transfer through Schaefer Defense before it can leave our shop.
Key Specifications
- Manufacturer: Colt
- Chambering: 5.56mm NATO
- Barrel Length: 11.5-Inch
- Upper Type: Monolithic
- NFA Classification: Short-Barrel Rifle (SBR)
- Capacity: 20 + 1
- Magazines Included: 1x 20-Round
- Action: Semi-Auto
- Sights: Magpul MBUS
- UPC: 098289020451
Colt’s monolithic upper design integrates the receiver and rail into a single forged unit, delivering a stiffer, more consistent mounting platform for optics compared to a two-piece upper/handguard setup. The included Magpul MBUS flip-up sights provide a reliable backup sighting system, ready to co-witness with a red dot or serve as your primary sights.
Frequently Asked Questions
Is this rifle a regulated NFA item?
Yes — with an 11.5-inch barrel, this is a short-barrel rifle (SBR) regulated under the National Firearms Act. It requires an approved ATF Form 4 transfer to a qualified buyer before delivery.
What is the federal transfer tax on this SBR?
Under the One Big Beautiful Bill Act (OBBBA), the federal transfer tax on this NFA item is $0.
Internal Links
Browse more Short Barrel Rifles (SBR) from Colt.
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