Gun Tools/Planning/Updated September 15, 2026
AR Build Cost Calculator: How Much Does It Cost to Build an AR-15?
How much does it cost to build an AR-15? Pick caliber, barrel length, stock or brace, optic and a price tier. Every slot fills with the part builders add most that is in stock, priced live, with the cheapest and median build beside it, real community builds that match, and one click to open it as a named build. Computed from over 1 million AR parts selected on GunPartPicker since 2020.
Quick answer
- A 16" 5.56 NATO AR-15 built from the parts builders add most, in stock at the mid tier, costs $1,546 on GunPartPicker as of September 15, 2026.
- The cheapest in stock build that fits the same selections is $394; a build from the median priced part in every slot is $1,463.
- Recent public GunPartPicker builds with a 16" 5.56 NATO barrel have a median parts total of $1,793 at today's best merchant prices.
- 14 of the 14 picks have been added to real builds by GunPartPicker users. Popularity is measured by how often builders add each part to a build, not by clicks.
Source: GunPartPicker catalog and build data, prices checked September 15, 2026
How much does it cost to build a 16" 5.56 NATO AR-15?
Change any selection and every slot refills with the part builders add most that is in stock and fits, at the tier you chose. Three totals: your picks, the cheapest in stock build that fits, and a median build. Popularity is computed from over 1 million AR parts selected on GunPartPicker since 2020.
Rifle
AR-15 receivers, 1/2x28 muzzle thread.
Calls for a mid-length gas tube.
Sets the gas block journal: .750 with this profile.
Override only if the barrel you want is drilled for a different length.
Bands are computed per slot over the parts that fit these selections, not over the whole catalog.
Upper receiver options
Must clear the muzzle device and cover the gas block.
Threaded 1/2x28 either way.
Lower receiver options
Applies to the lower and the upper.
Optics, extras and finish
Only used when the optic is an LPVO or a scope.
A preference, not a filter: parts in this color win ties, black fills in where nothing else is in stock.
Mid build, popular picks
$1,546
14 of 14 slots filled
Cheapest in stock
$394
the lowest priced part that fits, every slot
Median build
$1,463
the middle priced part that fits, every slot
Real builds like this
$1,793
median total of recent public builds with this barrel
Opens these picks in the AR-15 Builder as a saved build named above, priced at $1,492 today, ready to swap parts, share, or buy. Not carried over: lower parts kit (the builder has no slot for it; add it from the product page).
AR-15 parts list: 16" 5.56 NATO, mid tier, priced September 15, 2026
One part per slot: among in stock parts inside the tier band, the one builders add to real builds most, then the most reviewed, then the cheapest. Open any card for every merchant price.
- 01Stripped lower receiverMid pick
Griffin ArmamentGriffin Armament MK2 Ambi Stripped AR-15 Lower Receiver - Ambidextrous Controls - Flared Magwell - Anodized Black - MK2AL$208.95In StockThe serialized part. Ships to an FFL; the transfer fee is not in the total. Added to real builds by GunPartPicker users.109 that fit → - 02Lower parts kitMid pick
Sons of Liberty Gun WorksSons of Liberty Gun Works Blaster Starter Kit AR-15 LPK - No Grip/Trigger$54.15In StockPins, springs, detents, selector, bolt catch, mag release, usually a mil-spec trigger and grip. Lower build kits that bundle a stock and buffer tube are left out so nothing is counted twice. Added to real builds by GunPartPicker users.14 that fit → - 03TriggerMid pick
Rise ArmamentRise Armament Advanced Performance Trigger, Red - RA-535-RED-ARP$152.76In StockA mil-spec trigger comes in most parts kits; this slot is the upgrade most builders actually buy. Added to real builds by GunPartPicker users.407 that fit → - 04Pistol gripMid pick
Wilson CombatWilson Combat Ar-15 Starburst Gunfighter Pistol Grip Black$25.32In StockAdded to real builds by GunPartPicker users.390 that fit → - 05Buffer tube assemblyMid pick
KAK IndustryKAK Industry Mil-Spec Carbine Buffer Tube Kit, Black$41.85In StockTube, buffer, spring, castle nut and end plate. A carbine tube for a collapsible stock or a brace, a rifle tube for a fixed stock. Added to real builds by GunPartPicker users.60 that fit → - 06Stock or braceMid pick
Daniel DefenseDaniel Defense Collapsible Mil-Spec Buttstock, Brown - 21-091-04179-011$82.00In StockMil-spec tube diameter. A fixed A2 stock wants the rifle tube above. Added to real builds by GunPartPicker users.385 that fit → - 07Stripped upper receiverMid pick
Yankee Hill MachineYankee Hill Machine .223 Rem/5.56 Billet Upper Receiver, Hardcoat Anodized Matte Black - 110-BILLET$166.49In StockStripped, so the barrel, handguard, gas system, BCG and charging handle are chosen below. Added to real builds by GunPartPicker users.75 that fit → - 08BarrelMid pick
Faxon FirearmsFaxon Firearms 16" 223 Wylde Match Barrel Stainless Steel Black$246.60In StockLength read from the product name. The gas length that suits the barrel sets the gas tube below. Added to real builds by GunPartPicker users.113 that fit → - 09Gas blockMid pick
Sons of Liberty Gun WorksSons of Liberty Gun Works Gas Block V2 - .750"$45.00In StockJournal follows the barrel profile: .750 on government, M4 and heavy profiles, .625 on pencil and lightweight barrels. Check the barrel listing. Added to real builds by GunPartPicker users.159 that fit → - 10Gas tubeMid pick
WMD GunsWmd Guns Ar-15 Gas Tube Nitromet Mid-Length$14.40In StockMatched to the gas length in play: your override, or the one the barrel length calls for. Added to real builds by GunPartPicker users.19 that fit → - 11HandguardMid pick
Forward Controls DesignForward Controls Design Llc Ar-15 Handguard 13.7in. M-Lok Black$194.75In StockOne half inch to three and a half inches shorter than the barrel, so the muzzle device clears and the gas block is covered. M-LOK preferred. Added to real builds by GunPartPicker users.249 that fit → - 12Muzzle deviceMid pick
SilencerCoSilencerCo 30 Cal Muzzle Brake - AC591$64.99In StockThread and caliber matched to the barrel. Added to real builds by GunPartPicker users.344 that fit → - 13Bolt carrier groupMid pick
Bravo CompanyBravo Company M16 Bolt Carrier Group Black$199.00In Stock.300 Blackout runs the 5.56 BCG. AR-10 carriers are pattern specific; check DPMS versus Armalite fit against the upper. Added to real builds by GunPartPicker users.144 that fit → - 14Charging handleMid pick
Breek ArmsBreek Arms Ar-15 Warhammer Mod2 Ambidextrous Charging Handle Black$49.95In StockAdded to real builds by GunPartPicker users.327 that fit →
Real 16" 5.56 NATO AR-15 builds and what they cost today
Public builds on GunPartPicker with the same platform, caliber and barrel length, priced at today's best merchant price for every part. Fuller builds first. Open one to see the whole parts list.
16" build
33 parts · Aero Precision
$2,807
Backup 5.56 build
31 parts · Aero Precision
$7,353
Home defense 16" 5.56
29 parts · Yankee Hill Machine
$3,673
16" build
28 parts · Aero Precision
$3,616
new 5.56 build
27 parts · Aero Precision
$1,970
Aero Precision 16" build
27 parts · Aero Precision
$2,295
Cheapest vs median vs popular pick, slot by slot
Your pick beside the cheapest and the median in stock part that fits the same slot, so you can see which slots are worth spending on and which are not.
| Slot | Pick | Pick price | Cheapest that fits | Median that fits |
|---|---|---|---|---|
| Stripped lower receiver | Griffin Armament MK2 Ambi Stripped AR-15 Lower Receiver - Ambide | $209 | $38 | $170 |
| Lower parts kit | Sons of Liberty Gun Works Blaster Starter Kit AR-15 LPK - No Gri | $54 | $31 | $60 |
| Trigger | Rise Armament Advanced Performance Trigger, Red - RA-535-RED-ARP | $153 | $16 | $158 |
| Pistol grip | Wilson Combat Ar-15 Starburst Gunfighter Pistol Grip Black | $25 | $8 | $24 |
| Buffer tube assembly | KAK Industry Mil-Spec Carbine Buffer Tube Kit, Black | $42 | $20 | $45 |
| Stock or brace | Daniel Defense Collapsible Mil-Spec Buttstock, Brown - 21-091-04 | $82 | $15 | $65 |
| Stripped upper receiver | Yankee Hill Machine .223 Rem/5.56 Billet Upper Receiver, Hardcoa | $166 | $46 | $160 |
| Barrel | Faxon Firearms 16" 223 Wylde Match Barrel Stainless Steel Black | $247 | $86 | $217 |
| Gas block | Sons of Liberty Gun Works Gas Block V2 - .750" | $45 | $10 | $50 |
| Gas tube | Wmd Guns Ar-15 Gas Tube Nitromet Mid-Length | $14 | $7 | $16 |
| Handguard | Forward Controls Design Llc Ar-15 Handguard 13.7in. M-Lok Black | $195 | $31 | $180 |
| Muzzle device | SilencerCo 30 Cal Muzzle Brake - AC591 | $65 | $10 | $69 |
| Bolt carrier group | Bravo Company M16 Bolt Carrier Group Black | $199 | $63 | $180 |
| Charging handle | Breek Arms Ar-15 Warhammer Mod2 Ambidextrous Charging Handle Bla | $50 | $13 | $70 |
| Total | 14 of 14 slots | $1,546 | $394 | $1,463 |
How the parts are chosen from real build data
Every slot starts from the in stock parts in its category. The selections filter that set to what physically fits: barrels by caliber and length (read from the product name, which is what the merchant actually sells), the gas tube by the gas length that barrel length calls for, the handguard by a length that clears the muzzle device and covers the gas block, the muzzle device by thread and caliber, the bolt carrier by cartridge, the mount by the scope's tube diameter.
Popularity is not a guess. It comes from over 1 million AR parts selected on GunPartPicker since 2020: every time a builder adds a part to a build it counts, and that is the number each slot is ranked by. The price tier then keeps one third of what fits: the cheapest third, the middle third or the top third, computed for that slot and these selections. Inside the band the pick is the part builders add to real GunPartPicker builds most often, then the most reviewed, then the cheapest. If the band is empty the slot falls back to everything that fits and says so.
The real builds section is the check on the whole thing: public builds with the same platform, caliber and barrel length, each priced at today's best merchant price for every part in it. That is the difference from a price range table. The totals are real carts of real parts at today's prices, and they change when a part sells out.
What an AR build cost does not include
- Magazines and iron sights
- The FFL transfer fee on the lower
- Sales tax and shipping
- Armorer's wrench, vise block, punches, torque wrench
- Lubricant and the ammo to zero it
- A sling, a light, and everything else on the rail
Price it here, build it in the AR-15 Builder
Opens these picks in the AR-15 Builder as a saved build named above, priced at $1,492 today, ready to swap parts, share, or buy. Not carried over: lower parts kit (the builder has no slot for it; add it from the product page).
The AR-15 Builder checks caliber, platform, gas length, thread and mounting compatibility on every slot as you add parts, saves the build, and prices it across every merchant we track. Open any card above and add it from the product page, or start from a community build and swap the parts you would change.
Frequently Asked Questions
What does it cost to build an AR-15 in 2026?
It depends on the tier and the barrel. Set the caliber and length above and read the three totals: the most popular parts at your tier, the cheapest in stock parts that fit, and a median build. All three move daily with merchant prices, which is why this page does not print a number in its text.
Is it cheaper to build an AR-15 or buy one?
Buying wins at the bottom of the market. A complete budget rifle usually undercuts the cheapest parts build because the maker buys barrels and receivers by the thousand. Building wins once you want a specific barrel, trigger or handguard, because you pay for the parts you care about and mil-spec for the rest.
What parts does a complete AR-15 build need?
Stripped lower, lower parts kit, trigger, pistol grip, buffer tube assembly, stock or brace, stripped upper, barrel, gas block, gas tube, handguard, muzzle device, bolt carrier group and charging handle. That is the list this calculator fills. An optic and mount are optional slots.
What is not in the total?
Magazines, iron sights, the FFL transfer fee on the lower, sales tax and shipping, the armorer's wrench, vise block and punches, lubricant, and ammo to zero it.
How are the parts chosen?
Each slot is filtered to what fits your selections: barrel by caliber and length, gas tube by the gas length that barrel calls for, handguard by length, muzzle device by thread, BCG by cartridge, mount by scope tube. Inside that set the price tier keeps the cheapest, middle or top third, and the pick is the part builders add most, then the most reviewed, then the cheapest. Only in stock parts are considered.
Why is a slot empty?
Nothing in stock matches the selections. Lower parts kits and short barrels go in and out of stock week to week. Try the next barrel length or a different tier, and check the products page for that category.
Can I buy a complete lower and just build the upper?
Yes, and it is often the cheaper path. A complete lower replaces the lower, parts kit, grip, buffer tube and stock slots. Add those five prices up and compare them to a complete lower on the products page.
Do I need a gunsmith to assemble it?
No. An armorer's wrench, a vise with an upper receiver block and a torque wrench cover the upper. The only precision step is torquing the barrel nut and timing the gas tube hole. The lower is pins, springs and a castle nut.
Cite this tool: GunPartPicker, “AR Build Cost Calculator: How Much Does It Cost to Build an AR-15?”, https://gunpartpicker.net/tools/ar-build-cost-calculator. Data from the GunPartPicker catalog and real community builds, prices checked September 15, 2026. Free to cite with attribution.
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