For optics I chose to use Aimpoint's new Patrol Rifle Optic (PRO) and Vortex's 2.5-10X44 Viper PST in a Precision Reflex Industries mount. This choice of optics gives me a sight for CQB or precision, and the Viper because of its 2.5 power can be used for up-close-and-personal operations. I also wanted to use the Viper with its 10 power magnification to see how well the v5 Lightweight shoots. I find red dot sights do not bring out the best accuracy a firearm has to offer; especially with my middle-aged eyes.
Before testing the v5 Lightweight for accuracy, I needed to ensure it was reliable. To do this I loaded Lancer Systems' L5 magazines and Troy Industries' Battle Magazines with mixed ammunition from my odds-and-ends dump bag. This collection included bullets from most major manufacturers and some .224 bullet weights. The v5 Lightweight didn't care who made the cartridge or what the bullet weighed; it simply fired every time the trigger was pulled. Both the Troy Industries Battle Magazines and Lancer's L5 magazines fed this hodge-podge of ammunition into the v5 Lightweight cartridge after cartridge.
I zeroed my optics with the "junk" ammo. I didn't want to burn quality ammunition to get the carbine on paper. I figured why not see how the carbine functioned and zero the optics at the same time.
The v5 Lightweight carbine really shined with the 77-grain loads from Atlanta Arms and Black Hills. The best three-shot group was three-eighths of an inch at 100 yards. Using heavy .223 loads, 69 grains plus, this carbine consistently shot groups under an inch. It was no slouch with lighter bullets either; those groups were just over an inch, even my hand-loads. The Daniel Defense v5 Lightweight's accuracy was on par with a heavy barrel 20-inch rifle.
After I had the v5 Lightweight zeroed, I wanted to see how well the Vortex Viper optic's adjustments made corrections. Each click is one-quarter MOA and the clicks were accurate. I was able to walk the bullet impact from the center of the target to each target square and back; the Viper performs as advertised.
Switching from precision to more close-quarter shooting, I removed the Viper and replaced it with Aimpoint's PRO. The PRO comes with flip-up covers, QRP mount and battery (life is estimated to be three years); complete you will find this red dot priced $400 to $500, depending on the vendor or area.
Aimpoint's QRP mount properly aligns the optic with your eye. When mounted the PRO co-witnessed with the Magpul BUS front and rear. These sights lay flat and flip up in a flash when you depress the ambidextrous catch. If you run the carbine with the sights in the "up" position, they will be center co-witnessed.
Muzzle Brake and Suppressor
Thanks to the light weight of the v5 Lightweight and the SureFire muzzle brake there was very little muzzle rise and transitions between targets were smooth and fast. The PRO allowed for quick accurate shots at distances from seven to 25 yards.
I also ran the v5 Lightweight with a SureFire Mini. This 10-ounce suppressor not only reduces the noise and muzzle flash signature, it also reduces muzzle rise to next to nothing. It's also really quiet. My range is roofed and enclosed on three sides. But if you were behind the structure while the M4 with the Mini attached was being fired, it sounded like a muffled balloon breaking and you could not pinpoint the origin of the sound. This is exactly what SureFire's suppressors are designed to do.
A fighting carbine also needs a light. I mounted the new WL1-AA Light/Laser from Insight Technologies. This light is powered by inexpensive AA batteries instead of the pricey CR123As. The 150-lumen output truly will light the night at distances out to more than 75 yards. The adjustable laser further enhances this light, giving you a zeroed aiming point. Lasers increase accuracy when shooting from non-traditional shooting positions.
The WL1-AA is compact and barely adds three ounces to the M4. It gives the operator the choice of white light, laser, or both. You can lock the system out so you don't have an accidental discharge of light. To further enhance this light's function, there are two paddle switches that give you constant on or intermittent on.
Previous experience with Daniel Defense M4s led me to expect excellent performance from the v5 Lightweight; I was not disappointed. The Daniel Defense v5 Lightweight M4 is an awesome firearm. It is wicked accurate, easy to handle and carry, and it is boringly reliable. If you are looking for an M4 for duty, competition, or home defense, take a look at this carbine. I did. I loved it. And I made it my personal firearm. That is the highest recommendation I can give.
Scott Smith is a former federal police officer for the Department of Veteran's Affairs and a contributing editor to POLICE.
Daniel Defensev5 Lightweight Carbine Specs:
Caliber: 5.56 NATO
Capacity: 30 rounds with provided mag
Overall Length: 35 inches as shipped
Barrel Length: 16 inches
Barrel: Chrome moly vanadium steel, cold hammer forged, 1:7 twist
Weight (no sights): Six pounds, five ounces
Gas System: Midlength
Gas Block: Low profile gas block
Handguard: Omega X Rail 12.0
Grip: Vertical Foregrip
Buttstock: Magpul MOE Buttstock
Price: $1,469 (no sights)