AR-15 Upper Buying Guides: Complete Uppers, Budget Picks and Brand Comparisons
Best-of roundups and brand comparisons for uppers at every budget.
7 Upper Upgrade Gift Ideas for AR Owners
Shopping for gifts for gun owners who run an AR-15? See seven upper upgrades, from BCGs to handguards, plus how to match caliber and thread pitch.
More Buying Guides
How to Match an Upper to Your Training Plan This Year
Plan your AR-15 training year around the right upper. Match caliber, barrel length, rail and gas system to fundamentals, carbine drills or precision goals.
What to Inspect on a Used Upper Before You Buy
Shopping for a used AR-15 upper? Learn how to check the receiver, barrel, bore, gas system, bolt carrier group and headspace before you hand over any money.
Best AR-15 Uppers for Hunting: By Game and Terrain
The best hunting AR-15 upper depends on your quarry and terrain. Here's how to pick by cartridge, barrel length, and configuration.
AR-15 BCG Guide - Types, Coatings, and How to Choose the Right One
Every BCG type, steel grade, and coating explained with expert guidance. Shop bolt carrier groups at AR15Parts.com or call (888) 706-0633.
Best Low Power Variable Optics for AR Builds - Your LPVO Guide | AR15Parts.com
Find the best LPVO for your AR-15 build. We break down focal planes, magnification ranges, and price tiers. Read the full guide at AR15Parts.com.
Top 338 ARC Uppers for Hunting and Tactical Builds
Shop the best 338 ARC uppers for hunting and tactical builds. Built to order, headspaced, and function-checked. Ships direct, no FFL required.
Which Rail System Is Right for You? M-LOK vs KeyMod Handguards
M-LOK or KeyMod? See how SOCOM drop test data and accessory availability compare. AR15Parts.com helps you pick the right AR handguard. Call (888) 706-0633.
Best 6.5 Grendel Uppers: How to Pick the Right One
A no-nonsense guide to choosing a 6.5 Grendel upper: barrel length, twist rate, gas system, and what makes Grendel worth the switch from 5.56.
AR-10 / .308 Upper Buying Guide
Buying an AR-10 or .308 upper: DPMS vs. Armalite patterns, barrel length, gas system, and how to make sure the upper actually fits your lower.
AR-15 Pistol Upper Guide: NFA Rules, Barrel Length, and Caliber
AR-15 pistol upper guide: NFA rules, barrel and gas system pairing, caliber choice, and the brace vs. stock legal landscape.
Best 300 Blackout Upper: Barrel Length, Ammo, and Suppressor Guide
Find the best 300 Blackout upper: 8, 10.5, and 16 inch barrels compared, subsonic vs supersonic ammo, suppressor fit, and 5 real complete uppers.
AR-15 Handguard Buying Guide: What to Know Before You Buy
How to choose the right AR-15 handguard: free-float vs drop-in, length matching, materials, and attachment systems (M-LOK, KeyMod, Picatinny).