How to Build the M4 / AR-15 Rifle Used in I Am Legend

So you want to clone the M4 in I Am Legend?
Let’s do a little online window shopping, shall we?
(note: this post follows up on yesterday’s post on this subject)

Let’s build it from scratch. If I’m missing something here, or if you have insight that I may have missed, by all means comment away.

Sabre Defense Upper Receiver with necessary additions (bolt group, charging handle, and M4 receiver) – $595.00
: if you ARE building one, Ranger Man suggests going with the mid-length gas system and sticking with the 1:7 barrel twist for reasons I stated in this post. I would also upgrade the flash suppressor)

Yankee Hill Machine Quad Rail – $105.00

Command Arms Accessories Rail Covers – $27.95

Sabre Defense Complete Lower with 6-position Stock – $265.00

Trijicon ACOG TA31A – $1,015.00

Pentagon Light/Laser Combo – $339.24

Total Cost (not including magazines, sling, tax, FFL transfer fee, and shipping) = $2,347.19

Ranger Man would also suggest adding Low-Profile Back Up Iron Sights (BUIS) just in case your expensive Trijicon fails during combat (unlikely given they’re extremely rugged, but always possible) – $109.00

Max out the Visa and you’ve got a suh-weet zombie popper!

– Ranger Man

18 comments… add one
  • ryan January 3, 2008, 9:54 am

    Great analysis. Trijicon scopes are the bees knees but are just so expensive. I would love to get my hands on one, eventually I will find a way to afford and more importantly justify it.

  • Half Elf January 3, 2008, 6:02 pm

    I’m sorry, I just am not enamoredwith the “Stoner” weapon system, and yes I know it is the US standard. I don’t like a weapon that shits where it eats, and never had much use for a cartridge that isn’t legal for deer in several jurisdictions. 30 caliber turn cover into concealment, easier than .223, and this isn’t a flame, just a observation that any 2,300$ weapon better field dress and fillet the target game.

  • DW January 3, 2008, 7:48 pm

    For $2300 I’ll take a .308.

  • Doc January 3, 2008, 8:10 pm

  • Doc January 3, 2008, 10:25 pm

    While I agree on the midlength system being superior, to be a “true” clone, it must have an M4 profile/carbine gas system. It is impossible to tell exactly what rail system he used, but it must be a rail system that does not replace the delta ring.

  • Anonymous January 14, 2008, 1:13 am

    He used a Knights Armament RIS System

  • Doc January 17, 2008, 3:35 am

    Yep. 8 vent holes in the HG.

  • GARDA February 8, 2008, 10:01 pm

    I have to agree..2000 + is just to much to blow unless you are uber rich.

    for that money I would grab an M1 socom in 308

  • Michael Z. Williamson February 19, 2008, 2:23 am

    Armchair myths aside, .308 doesn’t bust any more cover than 5.56. Penetration is based on velocity and Cx. Not on some mythical manliness factor. Both are about the same. Both penetrate about the same–slightly less than one sandbag. End of discussion.

    The one critical upgrade I recommend for any AR is a hard chrome carrier and bolt, as was originally designed. Greater lubricity, more consistent lockup, easy to clean, improved reliability. I’m amazed at people who’ll drop $2 grand in accessories, but regard an extra $60 on a CRITICAL INTERNAL PART as an “overhyped waste.”

    Way back in the Cold War and then some, we USAF types were issued original slickside “AR15” M16s (not “A1”), with hard chrome bolt carrier groups.

    After a field exercise in the sand, mud, swamp and grit, we’d strip weapons, toss all the parts into a solvent tank (this being pre-MSDS on everything era), then pull out parts until we had a rifle. Gasp. Yup, swapped bolts, carriers, uppers, the works.

    I had ONE case separation in four years, and well over 20K rounds fired, since I was usually one of the aggressors and told “make lots of noise once the convoy/DAT team/sweep team gets here.”

    So much for the myth of unreliable M16s, too.

    In the 19 years after that, I did two tours in the Army, three in the AF, and never had any significant malfunctions, even when qualifying with an M4 some clown had failed to clean the entire year in Ashcanistan.

    The main mistake users make is too much oil. A drop on the gas rings, or better yet, dry graphite, and go to town.

    I’ll be shooting 5.56 long after the armchair .308 commando has run out of ammo naively trying to “turn cover(sandbags) into concealment.”

    .308 is for deer. People are not deer.

  • Alex May 22, 2008, 3:46 pm

    Can someone tell me what kind of Sling that it is in the movie? I have been looking for a sling similar to that for a while, and have been unsuccessful.

    Saw the movie and went “That is the exact sling I have been looking for”, but still can’t find any details.


  • akoch June 9, 2008, 9:25 pm

    Not to be a jerk or anything, but I have found some of you information to be slightly inaccurate. For literally every little detail on the firearms used in this movie, or any other movie, I’ve found this website is great:

  • MeNoLikeZombies June 28, 2008, 7:21 pm

    akoch is correct. The imfdb entry is most correct. ALTHOUGH, there are some good alternatives. I’m building one out as we speak and will probably go with a Surefire light system instead..

    If money is no object, use a Colt 6920 as the base gun. I don’t believe they sell these to the public anymore, but I’ve seen them on gunbroker and other auction sites.

  • Angry Mike July 26, 2008, 1:33 am

    I’ll have to look it up but I think I can save you a couple hundred on the ACOG. At least $100 anyway.

  • Angry Mike July 26, 2008, 1:44 am

    The .308 packs a little more punch and will shoot longer ranges more accuratley. Unless I have to plug someone at over 500 meters im not wasting time on a .308. I dont live in Crapghanastan so I dont need reach out and touch anyone/thing that far away. The ammo is heavy (and expensive)as hell, the mags hold 10 less rounds and the recoil can be a severe distraction if shooting on the move. I used the M1A/M-14. I love the weapon. Love it. It is probably the best weapon I ever shot but for everyday, all around use…Im just not trading my 5.56 Bushmaster in.

  • steve September 3, 2008, 10:52 am

    For those of you that are trying to figure out how to get an ACOG, go to the “Sportamans Guide”. If you are a member of their buyers club (10$) you can get anything they carry, they ship it right away, and bill you four equal payments. I have one, and another on they way. The new one is a TA31R made into a TA31TRD. Bring on the commies, or Zombies, or Both!

  • Alex December 4, 2008, 7:06 am

    Can you yell what is the hanguard use in the movie?
    It’s not the YHM… looks like a CASV.

  • Dave November 24, 2010, 4:25 pm

    yea I saw that gun on and its actually a colt 6940 and a 6920.

  • Bear May 24, 2011, 6:52 pm

    I am prepared to be wrong, are you?


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