PSA 11.5-inch Budget Pistol on a Geissele Blem Lower with OCL Polonium
$1,732.6513 parts
Build your own AR-15
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Pick a part for each slot in our free AR-15 builder, check that it all fits, and see the best price across stores for every part.
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Geissele Super Semi-Automatic Enhanced (SSA-E) Trigger- 05-160
$212.50 at MidwayUSA · 11 stores
In stock Sale
Aero Precision AR-15 M4E1 Stripped Lower Receiver - Black
$124.99 at Aero Precision · 5 stores
AR-15 Raptor Ambidextrous Charging Handle Black
$104.95 at Brownells · 10 stores
In stock
M16 Bolt Carrier Group Black
$211.26 at Brownells · 6 stores
In stock
AR-15 Talon Safety Selector Ambidextrous Black
$64.95 at Brownells · 9 stores
In stock
Upper Receiver Assembly
$129.00 at AR15Discounts · 5 stores
H1 Super 42 Braided Wire Buffer Spring And Buffer Combo, H2
$96.90 at MidwayUSA · 11 stores
In stock Sale
MOE K2 Grip Polymer Black
$14.99 at GunMag Warehouse · 9 stores
In stock
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.
Mk 12 SPR Clone Build Guide: Specs and Parts in Stock
The real Mk 12 Mod 0 and Mod 1 specs side by side, and the in-stock parts that come closest for a clone build …
AR-15 Barrel Length Guide: 10.5 vs 11.5 vs 14.5 vs 16 vs 18 vs 20
How much velocity each inch of AR-15 barrel really buys, which gas system goes with it, and how each length is priced today.
Folding Stock Adapters for AR-15s: How They Work
A hinge between receiver and tube: how AR-15 folding stock adapters work, what they add, and whether the rifle fires folded.