How Do I Build a Precision AR-10 for Long-Range Shooting?
Woody's answers are based on published federal and state law. Not legal advice. Consult a licensed attorney for your specific situation.
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.
How This Affects Your Precision
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).