Platform Dossier // AR-15

AR-15

One rifle, endlessly configurable. This is the complete field index to our AR-15 coverage: every buying guide, build sheet, and tuning manual, organized the way the rifle goes together, from your first complete build through fire control, glass, suppression, and the armorer's bench.

Field guides: 141
Sections: 13
Of intel: 28 hrs
Updated: 09.11.26

Clearance

Section 01

First Rifle

Start with a complete rifle or build your own. Either way, this is the on-ramp: what to buy, what to skip, and the mistakes that cost new owners the most.

13 guides

Start here

How to Build an AR-15: Complete Parts List & Step-by-Step Guide (2026)

Complete 2026 guide on how to build an AR-15 from a stripped lower with full parts list, tools needed, and step-by-step assembly. Budget tiers from PSA to Geissele with FFL transfer, lower parts kit, and complete upper selection.

8 min // Beginner

Read the guide

Best First AR-15 in 2026: Top 5 Rifles from Budget to Premium

12 min // Beginner

Best AR-15 Rifles 2026: Tier List, Budget to Premium

16 min // Beginner

AR-15 Parts to Avoid 2026: 10 Mistakes New Owners Make (Olight, Amazon Optics, Red Parts)

13 min // Beginner

Best AR-15 Brands 2026: BCM vs Daniel Defense & PSA

18 min // Beginner

Best Budget AR-15 Build 2026: Complete Parts List Under $700

10 min // Beginner

Best AR-15 Build Kits 2026: Pistol, 16-Inch, 9mm & .308

15 min // Beginner

Best Mid-Tier AR-15 Build 2026: Complete $1,000-1,300 Parts List

11 min // Intermediate

Best Upper-Mid-Tier AR-15 Build 2026: Complete $1,500-2,000 Parts List (BCM/DD/Geissele-Class)

12 min // Intermediate

Best AR-15 Upgrades 2026: First $500 Priority List (Trigger, Optic, Light, Stock)

11 min // Beginner

First 1000 Rounds 2026: New AR-15 Owner Training Plan

16 min // Beginner

AR-15 vs AK-47 in 2026: Which Should You Buy?

11 min // Beginner

AR-15 vs AR-10 2026: Beginner Guide to Choosing 5.56 or .308-Class Platforms

8 min // Beginner

Section 02

Calibers & Ballistics

What the rifle actually does downrange. Chambering choices, barrel-length trade-offs, and the ammunition data behind every drop chart.

9 guides

Start here

AR-15 Caliber Guide 2026: 5.56 vs 300 BLK vs 6.5 Grendel

Which AR-15 caliber should you buy? 5.56 vs 300 Blackout vs 6.5 Grendel compared on cost per round, ballistics, recoil, and availability. Data-driven buying guide with ammo recommendations for every use case.

14 min // Beginner

Read the guide

Best AR-15 Barrel Length: 11.5 vs 14.5 vs 16 Effective Range

10 min // Intermediate

Ballistics Chart & Calculator: 5.56 vs 300 BLK vs .308 Drop

19 min // Intermediate

Best 5.56 Ammo 2026: Training, Home Defense & Match

5 min // Intermediate

300 Blackout Ballistics: Barrel Length & Subsonic Ammo

13 min // Intermediate

300 Blackout vs 5.56: Cost, Recoil & Best Use Cases

10 min // Intermediate

Best 300 Blackout Ammo 2026: Top 8 Supersonic & Subsonic Loads Ranked (Barnes, Hornady, Lehigh)

15 min // Intermediate

338 ARC Build Guide 2026: Uppers, Barrels, Bolt & Mags

11 min // Intermediate

Best .308 Ammo 2026: Top 8 Match, Hunting & Training Loads Ranked (Federal, Hornady, Barnes, Nosler)

16 min // Intermediate

Partially disassembled AR-15 upper receiver on a gunsmith workbench under lamp light — Fig. 03 // Upper, Barrel & Gas

Section 03

Upper, Barrel & Gas

The upper half decides how the rifle shoots. Barrels, bolt carriers, gas tuning, and the parts that keep a suppressed gun running clean.

14 guides

Start here

Best AR-15 Barrels 2026: Top 7 Ranked (Criterion, Geissele, DD)

Seven 5.56 NATO AR-15 barrels ranked by use case: best overall mid-length, MK18-spec 10.3, stainless Recce, precision SPR, and lightweight pencil picks.

11 min // Intermediate

Read the guide

DI vs Piston AR-15: Cost, Reliability & Suppressor Use

6 min // Advanced

AR-15 Buffer Weight Chart: H1, H2, H3 & Gas Block Tuning

9 min // Intermediate

Best AR-15 Adjustable Gas Blocks 2026: Suppressor Picks

11 min // Intermediate

Best AR-15 Gas Blocks 2026: Fixed & Low-Profile

10 min // Intermediate

Best AR-15 Buffer Systems & Springs 2026: Weights, A5 & Captured

11 min // Intermediate

Best AR-15 BCG 2026: Duty, Suppressed & Budget Picks

17 min // Intermediate

AR-15 BCG Coatings 2026: DLC vs Nitride vs NiB Tested & Evaluated

6 min // Intermediate

Best AR-15 Charging Handles 2026: Radian Raptor vs Geissele ACH vs BCM

7 min // Beginner

Best Gas-Busting Charging Handles 2026: Suppressed AR-15 Picks

10 min // Intermediate

Best Side-Charging AR-15 Uppers 2026

10 min // Intermediate

Best AR-15 Complete Upper Receivers: BCM vs DD vs Geissele Compared

12 min // Beginner

Best AR-15 Stripped Upper Receivers: Forged, Billet & Slick-Side

12 min // Intermediate

Best 300 Blackout Barrels 2026: Suppressed, PDW & 16-Inch

11 min // Intermediate

Section 04

Handguards & Furniture

Where your hands live. Handguards, stocks, grips, and braces, plus how to shave real ounces without losing rigidity.

7 guides

Start here

Best AR-15 Handguards 2026: Top 10 Ranked (BCM, Geissele, LMT, CMT)

Best AR-15 handguards ranked: BCM MCMR, Geissele MK16, LMT Monolithic, CMT UHPR. Free float vs drop-in, M-LOK vs Picatinny, aluminum vs carbon fiber compared.

12 min // Intermediate

Read the guide

Suppressor-Ready Handguards 2026: Inner Diameter & Tucked Cans

10 min // Intermediate

Best AR-15 Stock 2026: Top 8 Stocks Ranked (Magpul CTR, B5 Bravo, BCM Gunfighter)

9 min // Beginner

Best AR-15 Pistol Grips 2026: Magpul, BCM, B5, Reptilia Ranked

12 min // Beginner

Best AR-15 Pistol Braces 2026 (Buffer Tube, Folding & PDW)

10 min // Intermediate

Best Folding Stock Adapters for AR, AK & Chassis Rifles

11 min // Intermediate

Best Lightweight AR-15 Parts 2026: Top 10 Ranked (Faxon, BCM, SLR, Aero)

13 min // Intermediate

Section 05

Lower & Controls

Receivers and the small parts you touch a thousand times: selectors, magazine releases, bolt catches, and full ambidextrous conversions.

8 guides

Start here

Best AR-15 Lower Receivers 2026: Aero, BCM, Geissele Ranked

Forged, billet, complete, ambi, polymer, matched set. Nine AR-15 lower receivers ranked by buyer use case, with FFL realities, M16-pocket SBR notes, and the trigger compatibility gotchas no one warns you about.

11 min // Intermediate

Read the guide

Best Ambi AR-15 Lower Receivers 2026: ADM, LMT, Radian Ranked

10 min // Intermediate

Best AR-15 Lower Parts Kits 2026: Top Picks Ranked (SOLGW, DD, CMMG, Aero)

14 min // Intermediate

How to Make Your AR-15 Ambidextrous 2026: Full Controls Conversion

10 min // Intermediate

Best AR-15 Safety Selectors 2026: Ambi, Short-Throw & Duty Picks

11 min // Beginner

Best AR-15 Takedown & Pivot Pins 2026: Extended & Titanium

12 min // Intermediate

Best AR-15 Magazine Releases 2026: Extended, Ambi & Oversized

10 min // Intermediate

Best AR-15 Bolt Catches 2026: Ambi, Maritime & Enhanced

10 min // Intermediate

Section 06

Fire Control

The single upgrade shooters feel most. Match triggers, binaries, forced reset systems, and how to tune them.

8 guides

Start here

Best AR-15 Triggers 2026: Geissele vs LaRue vs ALG Compared

Best AR-15 triggers ranked: LaRue MBT-2S best value, ALG ACT budget king, Geissele SSA duty proven. Honest assessment of diminishing returns and why reset speed matters more than break quality.

11 min // Intermediate

Read the guide

Geissele SSA vs LaRue MBT-2S 2026: Which Two-Stage AR-15 Trigger Wins? (SSA-E Included)

14 min // Intermediate

Best Binary Triggers 2026: BFSIII by Platform

10 min // Intermediate

Super Safety Guide 2026: Forced Reset Selectors for AR-15 (FRT, Binary)

9 min // Advanced

AR-15 FRT Tuning Guide 2026: Buffer Weight, BCG & Troubleshooting

11 min // Advanced

FRT Compatible Guns 2026: Every Platform With a Forced Reset Trigger

9 min // Beginner

AR9 FRT Build Guide 2026: 9mm Forced Reset & Blowback Tuning

11 min // Advanced

AR22 FRT Build Guide 2026: .22LR Forced Reset Done Right

18 min // Advanced

Low-power variable optic mounted on an AR-15 on a shooting bench at dusk — Fig. 07 // Optics & Sighting

Section 07

Optics & Sighting

Glass earns half the budget for a reason. Red dots, LPVOs, prisms, magnifiers, mounts, and zeroing, matched to how you actually shoot.

19 guides

Start here

AR-15 Optics: Red Dot vs LPVO vs Prism vs Magnifier

Choose an AR-15 optic class before shopping models. Compare red dots, LPVOs, prisms, and magnifiers by range, mounted weight, eye needs, and reticle type.

8 min // Beginner

Read the guide

Best AR-15 Red Dots 2026: Aimpoint vs Holosun vs EOTech Compared

9 min // Beginner

Best LPVO for AR-15 2026: Vortex vs Trijicon vs Primary Arms

5 min // Intermediate

Best Budget LPVO for AR-15 2026: Top 7 Value Picks

11 min // Beginner

Best Scope for AR-15 in 2026: LPVO, Prism & Magnifier

11 min // Intermediate

Best Budget AR-15 Optics 2026: Red Dots, Prisms & LPVOs

10 min // Beginner

Best Prism Scope for AR-15 2026: Astigmatism, ACOG & ELCAN Picks

10 min // Intermediate

Best Red Dot Magnifiers for AR-15 in 2026: 3x Picks & Mounts

10 min // Beginner

Best AR-15 Red Dot Magnifier Combos 2026: EOTech, Holosun, Aimpoint

10 min // Intermediate

Holosun ARO vs Sig Romeo 5 Gen 2 2026: Enclosed vs Open Emitter Red Dot Compared

13 min // Beginner

Best Holosun Optics 2026: Top Rifle & Pistol Red Dots Ranked (AEMS, 509T, ARO)

11 min // Beginner

Best EOTech for AR-15: EXPS3 HD vs EXPS3 vs XPS2

11 min // Beginner

Best Trijicon Optics 2026: RMR, MRO, ACOG, SRO & Credo Ranked

12 min // Beginner

Best LPVO and AR-15 Scope Mounts 2026

11 min // Intermediate

Best AR-15 Red Dot Risers and Optic Mounts 2026

11 min // Intermediate

Best Offset Red Dot Mounts 2026 (45-Degree + LPVO Wing)

11 min // Intermediate

Best AR-15 Iron Sights 2026: Top BUIS Ranked

12 min // Beginner

AR-15 Optic Mounting 2026: Complete Guide (Red Dots, Scopes, Accessories)

9 min // Intermediate

How to Zero AR-15 Optics 2026: 50/200 Zero Chart, Printable Targets & Clicks Calculator

9 min // Intermediate

Section 08

Muzzle & Suppressors

From flash hiders to full suppression: muzzle devices, mounting systems, and the cans that pair best with 5.56 and .300 Blackout.

6 guides

Start here

Best Muzzle Devices for AR-15 2026: Top 10 Ranked (SureFire, Dead Air, Rearden)

Best AR-15 muzzle devices ranked: flash hiders, muzzle brakes, compensators, and suppressor mounts compared with pros, cons, prices, and use-case recommendations.

11 min // Intermediate

Read the guide

Suppressor Mounting Systems 2026: HUB, KeyMo, ASR & SOCOM Compared

11 min // Intermediate

AR-15 Suppressor Setup 2026: Complete Compatibility & Tuning Guide

8 min // Advanced

Best 5.56 Suppressors 2026: 15 Cans Ranked by Test Data

20 min // Intermediate

Best 300 Blackout Suppressors 2026: Subsonic, Supersonic & SBR Picks

10 min // Intermediate

Best Suppressor Covers 2026: Heat, Mirage & Burn Protection Compared

12 min // Intermediate

AR-15 with weapon light and IR laser on a rifle case under moonlight and fog — Fig. 09 // Lights, Lasers & Night Ops

Section 09

Lights, Lasers & Night Ops

White light, IR, and thermal. Building a rifle that keeps working after the sun goes down.

6 guides

Start here

Best AR-15 Weapon Lights 2026: SureFire, Modlite, Streamlight

Best weapon lights for AR-15 ranked by candela output in 2026. SureFire M640DFT, Modlite PLHv2, Cloud Defensive REIN 3.0, Streamlight ProTac HL-X, and Arisaka compared. Lumens vs candela explained, throw vs flood beam patterns, tape switch warnings.

13 min // Beginner

Read the guide

Lightest Rifle Weapon Lights: Weight-First Rankings

11 min // Intermediate

Streamlight vs Cloud Defensive vs SureFire 2026: AR-15 Weapon Lights Compared (Lumens, Candela, Price)

12 min // Intermediate

Best IR Illuminator for AR-15 2026: Top 8 Ranked (MAWL, RAID Xe, Holosun, DBAL)

18 min // Advanced

AR-15 Night Vision Setup 2026: Complete Guide (PEQ-15, DBAL, Optic Heights)

8 min // Advanced

Best Clip-On Thermal for AR-15 2026: Top Picks Compared (Pulsar, AGM, SIG)

12 min // Advanced

Section 10

Support Gear & Storage

Everything around the rifle: slings, bipods, magazines, cases, and the safes that protect the investment.

10 guides

Start here

Best AR-15 Accessories 2026: Must-Have Upgrades Ranked by Category

Best AR-15 accessories ranked by category: optics, lights, slings, triggers, stocks, and more. Budget and premium picks for each must-have upgrade. Complete accessories list with what to buy first.

14 min // Beginner

Read the guide

Best AR-15 Sling 2026: Top 7 Slings Ranked (Vickers, VTAC, Magpul MS4)

12 min // Beginner

Best AR-15 Foregrips and Hand Stops 2026: BCM KAG, Magpul AFG, Arisaka, Emissary

11 min // Beginner

Best AR-15 Bipod 2026: Best Rifle Bipod Picks Ranked (M-LOK & Picatinny)

9 min // Beginner

Best AR-15 Magazines 2026: PMAG vs Duramag (Why We Skip Lancer)

10 min // Beginner

Best AR-15 Mag Pouches 2026: KYWI, Elastic & TACO Ranked

10 min // Intermediate

Best Rifle Range Bags 2026: Top Gun Range Bag Picks for Tactical and Shooting Range Use

12 min // Beginner

Best Rifle Soft Cases 2026: Single, Double & Discreet Picks

10 min // Beginner

Best Tactical Duffel Loadout Bags 2026: Ranked Picks for Class-Day and Range Carry

13 min // Beginner

Best Rifle Safes & AR-15 Safes 2026: Liberty, Browning, Vaultek

10 min // Beginner

Section 11

Complete Builds & Clones

Proven recipes. Military clone builds, mission-specific configurations, and the paperwork-aware paths to an SBR.

15 guides

Start here

MK18 Build Guide 2026: Mod 0, Mod 1, and MK18-Style Parts List

MK18 parts-list guide for strict Mod 0 / Mod 1 clones and modern 10.3 inch MK18-style builds, plus CQBR program history and current-issue configuration. Covers barrel, RIS II rail, BCG, optics, lights, and suppressor pairing.

16 min // Intermediate

Read the guide

MK12 Build Guide 2026: SPR Clone & Modern 18-Inch Parts List

12 min // Intermediate

URGI Clone Build 2026: Strict & Practical Geissele Parts Lists

11 min // Intermediate

M4A1 SOPMOD Block 1 Clone Build 2026: Strict & Practical Lists

11 min // Intermediate

M4A1 SOPMOD Block 2 Clone Build 2026: Strict & Practical Lists

13 min // Intermediate

Best Military Clone Builds 2026: MK18, Block II, URGI & Spear LT Parts Lists

14 min // Intermediate

AR-15 Build Guide 2026: Home Defense, Recce & Patrol Rifle Complete Parts Lists

8 min // Intermediate

Civilian IAR Build Guide 2026: AR-15 Automatic Rifle Setup (Block 2, Hopsaw, Belt-Fed)

16 min // Advanced

AR-15 PDW Build Guide 2026: Exact Overall Lengths 15" to 27" (DDM4 vs Rattler)

11 min // Intermediate

Best SBRs 2026: Top 12 Factory Rifles & Form 1 Picks

13 min // Intermediate

AR Pistol to SBR: 2026 Form 1 Conversion Guide

13 min // Intermediate

Best AR-15 for Home Defense 2026: Top Rifles & Setup Guide (PSA, S&W, Aero, Sig)

11 min // Beginner

Best Truck Gun 2026: Braced AR Pistols, PCCs & Shotguns

15 min // Intermediate

Backpack Gun Setup Guide 2026: Bags, PDWs & Essential Accessories

11 min // Intermediate

How to Build a Featureless AR-15 (California & NY 2026)

10 min // Intermediate

Section 12

Maintenance & Tools

Keep it running. Cleaning intervals, armorer's schedules, and the bench tools worth owning.

5 guides

Start here

How to Clean an AR-15 2026: Complete Step-by-Step Cleaning Guide

Step-by-step AR-15 cleaning guide covering field strip, bore cleaning, BCG carbon scraping, lubrication points, and a practical maintenance schedule. Includes recommended cleaning kits and common mistakes to avoid.

13 min // Beginner

Read the guide