Gun Builders

Gun Builders Depot (based in Indianapolis, IN) operates as a national distributor of individual firearm components, build kits, and manufacturing tools. They specialize in making DIY gun building accessible by stocking everything needed to complete an AR-15, LR-308, AR-9, or handgun from scratch.

80% Lower Jigs & Tooling - Liberty 80% Lower Jig (AR-15/AR-9) — $99.99–$179.99 - Elite Builder 80% Lower Jig (AR-15/AR-9) — $149.99–$244.99 - Broken Arms 80% Lower Jig (AR15/AR9 with tooling) — $199.99–$279.99 - Elite Builder Patriot Jig (AR9/AR10/AR15 compatible) - Juggernaut Tactical AR-15 Jig - Polymer80 jigs for PF9SS frames - Replacement top plates and jig tooling

• •AR Build Kits (24+ rifle configurations in stock)
• •AR-15 Rifle Kits: 5.56, .223 Wylde, .300 Blackout, 9mm
• •LR-308 Rifle Kits: multiple barrel lengths and finishes
• •Specialty Calibers: 6.5 Creedmoor, 7.62x39, AR-9
• •Barrel options: Parkerized, Nitride, Stainless Steel, Fluted
• •Handguards: M-Lok, Keymod, A2 styles
• •Cerakote finishes available (Tungsten, OD Green, FDE, Storm Trooper White)

Handgun Build Kits - Glock-compatible kits and components - SIG SAUER P320 and P365 parts - 1911 build kits and parts - Complete slides, lower parts kits, sights, barrels, magazines

Component Inventory - AR Lower Parts Kits (Mil-Spec with hammer/trigger) - Buffer tube assemblies and stocks - Bolt carrier groups and charging handles - Upper receivers and complete assemblies - Triggers, pistol grips, handguards, rails - Muzzle brakes and devices

Optics & Accessories - Red dot sights and reflex sights - Flip-up iron sights - Rifle scopes - Pistol and rifle red dots - Sling options (Allen Company, Magpul) - Gun cleaning kits (Real Avid brand) - Gun cases and range bags - Shooting glasses (Howard Leight) - Stabilizing bags (Caldwell DeadShot)

An 80% lower is an incomplete receiver blank—it hasn't been drilled and can't accept a lower parts kit as-is. You need a jig to finish it.

The jig uses side plates and top plates to act as cutting guides. Once installed on your 80% blank, you: 1. Mill or drill out the interior cavity for the trigger group 2. Drill pin holes for the trigger, hammer, disconnector, and safety 3. Install the lower parts kit

Typical specs: - Completion time: 30 minutes to 1 hour - Tools needed: Drill press or mini-mill, vise, basic hand tools - Bits and tooling included with most jigs - Compatible across most 80% blank brands

Polymer 80, Savior Equipment, Magpul, G.P.S., Rook Tactical, SIG SAUER, Leapers, Aero Precision, Real Avid, Elite Builder, Broken Arms, Liberty, Juggernaut Tactical

• •Same-day or next business day shipping from Indianapolis warehouse. Note: Products ship to most states, but some items prohibited to CA, CT, DC, Hawaii, NJ, NY, RI, WA due to state-specific regulations. Check their Shipping & Returns policy before ordering.

Gun Builders Depot is clear: state laws vary significantly on 80% lowers, firearm blanks, and component legality. They do not provide legal advice. Builders must research their own state and federal laws before assembly. Many states restrict or ban these products entirely. Federal law applies, but state restrictions may override it.

• •Contact: 888-310-0284 | [email protected]