BCM Dark Bronze 14.5-inch on a Spikes Lower
$1,829.7410 parts
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First Build: Geissele Upper on an ADM UIC Ambi Lower with OCL Polonium K
$2,160.3714 parts
BCM 14.5-inch SOCOM Upper with DD RIS II on an LMT MARS-L Lower
$4,067.4214 parts
PSA 14.5-inch Quad Rail on an FDE Aero M4E1 Lower
$637.625 parts
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Geissele Super Semi-Automatic Enhanced (SSA-E) Trigger- 05-160
$245.00 at Brownells · 8 stores
In stock
Aero Precision AR-15 M4E1 Stripped Lower Receiver - Black
$124.99 at Aero Precision · 2 stores
M16 Bolt Carrier Group Black
$211.26 at Brownells · 6 stores
In stock
AR-15 Talon Safety Selector Ambidextrous Black
$64.95 at Brownells · 7 stores
In stock
AR-15 Raptor Ambidextrous Charging Handle Black
$104.95 at Brownells · 8 stores
In stock
H1 Super 42 Braided Wire Buffer Spring And Buffer Combo, H2
$108.99 at Kentucky Gun Co · 8 stores
In stock
MOE K2 Grip Polymer Black
$14.99 at GunMag Warehouse · 9 stores
In stock
B5 Systems SOPMOD Bravo Stock - Black BRV-201-01
$54.19 at Palmetto State Armory
From the blog
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How to Build an AR-15: Parts List, Tools & Steps
Everything you need to build an AR-15: parts list with current prices, tools, and step-by-step photos for the lower and upper receiver.
Best AR-15 Magazines: PMAG, Lancer and More (Live Prices)
PMAG Gen M3 vs M2 MOE vs Lancer L5AWM vs Daniel Defense vs aluminum: maker specs and today's prices.
7.62x39 AR-15 (AR-47) Guide: Bolts, Magazines and Uppers
What a 7.62x39 AR-15 needs: barrel, bolt-face depth, magazines, and the AK-magazine alternative, with prices.
Best Flip-Up Backup Sights for AR-15s (Live Prices)
Magpul MBUS, MBUS Pro, KRISS and KAC flip-up sights compared on maker specs, with today's prices.