The Bushmaster QRC II is a semi-automatic carbine chambered in 5.56x45mm NATO with a 16-inch barrel, 10+1 capacity, and a six-position collapsible stock. Overall length adjusts between 32.50 and 36 inches. Weight is 5.80 lbs. 
 

Key Specifications 

• Model: QRC II 
• Brand: Bushmaster 
• Caliber: 5.56x45mm NATO 
• Action: Semi-Auto 
• Barrel Length: 16 inches 
• Capacity: 10+1 rounds 
• Trigger: Mil-Spec 
• Safety: Manual Thumb Safety 
• Overall Length (OAL): 32.50" - 36" (adjustable) 
• Weight: 5.80 lbs 
• Stock Type: 6 Position Collapsible Carbine 
• Muzzle Device: A2 Flash Hider 
• Sights: Optic Ready 
• Receiver Material: 7075-T6 Aluminum 
• Twist Rate: 1:7" 
   

Detailed Features 

The upper and lower receivers are 7075-T6 aluminum, the same alloy spec used in mil-spec AR builds. The 1:7" twist rate stabilizes bullet weights from 55 grains up through 77-grain loads, giving flexibility for different ammunition choices. The six-position stock adjusts length of pull for shooters of different sizes or those shooting with body armor. 
 
The optic-ready top rail has no iron sights included. You'll need to add a red dot, scope, or BUIS. The A2 flash hider is standard and takes standard A2-compatible accessories. The mil-spec trigger is functional; most competition or precision-focused shooters will want to upgrade it, but it's adequate for general use. 
 

Usage 

At 5.80 lbs, the QRC II is light for a 16-inch carbine. It suits range use, home defense, and basic carbine training. The 10+1 capacity reflects jurisdiction restrictions common for this model. The adjustable stock makes it practical for multiple users or variable shooting positions.

User feedback on the Bushmaster QRC II tends to be positive overall. Reliability gets the most consistent praise. Owners report it cycles reliably across a range of 5.56 NATO and .223 Rem loads. The 7075-T6 aluminum receiver construction and overall build quality are noted favorably.

The optic-ready design is well-received. Most AR owners want to mount their own optics rather than use factory iron sights, so the bare rail is practical. The adjustable stock is mentioned as a plus for households with multiple shooters.

On the critical side: the mil-spec trigger is the most common complaint. It's functional but nothing more, and shooters coming from nicer triggers notice it. Customer service experiences are mixed; some users report smooth warranty handling while others had slower resolution. The price is generally considered fair for a 7075 aluminum AR at the budget-to-mid-range tier. Aftermarket parts availability is good since it takes standard AR-15 components.