How Do I Build a Precision AR-10 for Long-Range Shooting?
Start with an Aero Precision M5 receiver set or equivalent, a Criterion or Proof Research 22- to 24-inch barrel in 6.5 Creedmoor, a quality two-stage trigger (TriggerTech Diamond or Geissele SSA-E), and a free-float M-LOK handguard. Budget $2,000 to $3,500 for a sub-MOA capable precision AR-10 that competes in gas gun division PRS matches. The critical components are the barrel, trigger, and ammunition — everything else is secondary.
Why It Matters
A precision AR-10 fills a unique role — it offers semi-auto speed for PRS gas gun division or tactical scenarios while approaching bolt-action accuracy. Building one yourself lets you prioritize the components that matter most (barrel, trigger) and save money where it matters least (receivers, furniture). A well-built AR-10 in 6.5 Creedmoor can shoot 0.5 to 0.75 MOA groups, making it competitive at matches out to 1,200 yards.
Feed your precision AR-10 with quality match ammo — find the loads your rifle loves.
Shop 6.5 Creedmoor Ammo at Lucky Gunner →The Detail
Precision AR-10 build list:
Receivers ($250-$600):
- Budget: Aero Precision M5 receiver set ($250) — best value in AR-10
- Mid-range: Mega Arms MATEN ($500) — tighter tolerances
- Premium: LMT MWS or KAC SR-25 lower ($600+) — military proven
Barrel ($300-$700) — THE most important component:
- Criterion Hybrid 22" 6.5 CM ($350): excellent accuracy-to-cost ratio
- Proof Research carbon fiber 22" ($650): lightweight, accurate, heat-resistant
- Bartlein or Krieger blank ($400): custom-grade, requires gunsmith fitting
- Twist: 1:8 for 6.5 CM, 1:10 for .308
- Profile: medium-heavy for precision work
Bolt carrier group ($200-$350):
- Toolcraft 6.5 CM BCG ($150): reliable workhorse
- JP Enterprises LMOS ($300): lightweight, precision-grade
- Ensure headspacing is correct for your barrel
Trigger ($150-$300):
- TriggerTech Diamond ($275): adjustable, zero creep, competition standard
- Geissele SSA-E ($240): two-stage, combat proven, excellent for precision
- LaRue MBT-2S ($100): incredible value, rivals triggers 3x its price
Handguard ($150-$350):
- Aero ATLAS R-ONE 15" ($150): lightweight, M-LOK, free-float
- Midwest Industries 15" ($200): proven, rigid
- Must be free-float — no two-piece or drop-in handguards for precision
Buffer system:
- Rifle-length buffer tube with A2 or PRS stock
- JP Enterprises Silent Captured Spring ($130): smoothest cycling, tunable
- Adjustable gas block required: Superlative Arms or SLR Rifleworks
Stock ($100-$400):
- Magpul PRS Gen 3 ($250): adjustable LOP and cheek riser, heavy and stable
- Luth-AR MBA-1 ($100): budget alternative with adjustments
Optic ($700-$2,000+):
- Vortex Viper PST Gen II 5-25x50 FFP MRAD ($700)
- Vortex Razor HD Gen III 6-36x56 ($2,000)
- Mount: Badger Ordnance Condition One ($300) or Scalarworks LEAP ($450)
Total build cost:
- Budget competitive: $1,800-$2,200
- Mid-range competitive: $2,500-$3,500
- No-compromise: $4,000-$6,000
Build Impact
The barrel and trigger are where your money makes the biggest accuracy difference — never cheap out on these. Use an adjustable gas block from the start. Ensure your bolt headspaces correctly with your barrel before your first range trip. A precision AR-10 needs match-grade ammunition to perform — do not test accuracy with bulk ammo. Start load development or find a factory load your rifle likes (Hornady ELD Match 140gr is a common winner in 6.5 CM AR-10s).