$20
Competition 16" AR-15 Build Spec · PDF, 4 pages · Rev 1.5
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All sales are final. The PDF downloads right after you pay, so spec sheets aren't refundable.
What's in it
Every part on this rifle is there for a reason. Here's what each one does. The sheet names the exact make and model.
The receivers
A matched upper and lower, made as a pair, with every control on both sides. Either hand runs the rifle.
The barrel
A 16-inch match-grade barrel with a chamber that shoots both .223 and 5.56 accurately, so you aren't tied to one kind of ammo.
The gas
A gas block you can tune. Most rifles run on more gas than they need. Turning it down to just enough softens the recoil and is easier on the parts.
The moving parts
A lighter bolt carrier and a tunable buffer spring, set up to work with the gas setting. Less weight slamming back and forth between shots.
The trigger
An adjustable pull weight: lighter for precision stages, heavier for fast multi-gun work.
The muzzle
A brake picked to keep the muzzle flat, so the reticle stays on target through fast pairs.
The optics
A premium 1–6× scope on a precision mount, plus a 45° offset red dot for close targets without touching the magnification.
The setup
The order I tune it in, step by step, and why that order. Get it wrong and you chase your tail.
The sheet gives you:
- The exact make and model of every part, and what each one does for recoil, speed or reliability.
- The tuning sequence I use, from the first gas setting to break-in.
- My assessment of how it shoots, labeled as my assessment. Group sizes aren't measured yet; when they are, they go in the sheet and your link gets the update.
- What's still open: the pistol grip and the red dot on the offset mount (a budget optic for now).
Before you buy
- This is a parts list and setup notes for a rifle I own. It isn't gunsmithing instructions.
- Laws on rifle features differ from state to state, and some states restrict them. Check yours before you build.
- In New Jersey, this is an NJ Other build: a brace, never a stock; more than 26 inches overall; a vertical foregrip; magazines of 10 rounds or fewer; no suppressor. That's how I built and own it here, and the sheet spells it out up front. Follow New Jersey's current restrictions too; they change. Outside New Jersey, the stock is your call.
- I'm not a professional gunsmith. I'm a shooter who built three AR-15s and wrote down what worked on this one.
- Not sponsored by any of these companies.
$20
All sales are final. The PDF downloads right after you pay, so spec sheets aren't refundable.
Questions before you buy? Email [email protected].