The LE6940 Series consists of the LE6940, LE6943, LE6944, R0923. The primary differences between models is barrel length, selector positions and stocks. See technical specifications below.

LE6940
Caliber: 5.56 x 45 NATO
Weight: 6.79 lbs. (3.07 kg)
Overall Length: 32" (81.28 cm) Stock Retracted
                35.5" (90.17 cm) Stock Extended
Barrel Length: 16.1" (40.89 cm)
Fire Control: Semi
Rifling: 1/7 Right Hand
Effective Range: 600 meters
Additional Features: Colt Rogers Super-Stoc (2013), 30-round 
    PMAG magazine, Magpul MBUS Rear Sight (GEN 2)

Catalog listing years: 2013

LE6943
Caliber: 5.56 x 45 NATO
Weight: 6.3 lbs. (2.86 kg)
Overall Length: 27.5" (69.85 cm) Stock Retracted
                30.75" (78.1 cm) Stock Extended
Barrel Length: 11.5" (29.2 cm)
Fire Control: Semi
Rifling: 1/7 Right Hand
Effective Range: 400 meters
Additional Features: Colt Rogers Super-Stoc (2013), 30-round
    PMAG magazine, Magpul MBUS Rear Sight (GEN 2)

Catalog listing years: 2013

LE6944
Caliber: 5.56 x 45 NATO
Weight: 6.6 lbs. (2.99 kg)
Overall Length: 30.5" (77.5 cm) Stock Retracted
                33.75" (85.7 cm) Stock Extended
Barrel Length: 14.5" (36.83 cm)
Fire Control: Semi
Rifling: 1/7 Right Hand
Effective Range: 600 meters
Additional Features: Colt Rogers Super-Stoc (2013), 30-round
PMAG magazine, Magpul MBUS Rear Sight (GEN 2)

Catalog listing years: 2013

R0923
Caliber: 5.56 x 45 NATO
Weight: 6.6 lbs. (2.99 kg)
Overall Length: 30.5" (77.5 cm) Stock Retracted
                33.75" (85.7 cm) Stock Extended
Barrel Length: 14.5" (40.89 cm)
Fire Control: Safe-Semi-Auto
Rifling: 1/7 Right Hand
Effective Range: 600 meters
Additional Features: Standard M4 buttstock, 30-round
    magazine, Folding-adjustable rear sight

Catalog listing years: 2013