Colt AR-15A4

The AR-15 series is a popular rifle across government agencies (law and military), home defense, hunting, and competitive competitions.  AR-15′s effective range is 400-600 meters depending on conditions.


Colt AR-15 Technical Details

Caliber 5.56×45 NATO
Barrel Length (in.) 20
Bore Chromed, 6 Grooves, 1-7″ RH Twist
Front Sight Adjustable Post for Elevation
Rear Sight Adjustable for Windage
Length 37.5″
Weight 7.71 lbs
Action Direct Gas System, Locking Bolt
Finish Color Matte Black

Source: Colt

Is the Colt AR-15 difficult to build from scratch as a home gunsmithing project?

The AR-15 is a highly accurate and refined firearm however the operations of the AR-15 is really quite simple. Simplicity is a great thing if you are still gaining experience as a home gunsmith. Some key points of simplicity include low maintenance; low recoil action, light weight, lots of accessories, semi-automatic, and lots of additional information can be found on gun forums such as and

3 ways to purchase a Colt AR-15:

  1. Purchase new through a dealer. This will cost between $1,000 to $1,500.
  2. Purchase used through a dealer. Unfortunately these guns even used are not cheap. Expect to pay 90% of the original price (~$900 to $1,400)
  3. DIY Home Gunsmithing project: If you are well trained a DIY Colt AR-15 will cost about $700.