AR-15 80% Lower With Fire/Safe Engravings | SBA3 | Mil-Spec LPK | Carbine Buffer Tube Kit

Build your custom firearm from the ground up with the AR-15 80% Lower Build Kit featuring SB Tactical SBA3 Pistol Brace & Mil-Spec LPK. Engineered to deliver exceptional durability and reliability, this comprehensive bundle combines a precision-machined 80% lower receiver, a complete Mil-Spec lower parts kit, a 6-position carbine buffer assembly, and the iconic SB Tactical SBA3 Pistol Stabilizing Brace.

The heart of this kit is the AR-15 80% Lower Receiver, forged from high-strength 7075-T6 aluminum and finished in a rugged Type III Class 2 Hardcoat Anodize. It features pre-engraved "Fire/Safe" markings, a flared magwell for smooth reloads, and a broached magwell structure compatible with multiple calibers including 5.56 NATO, .223 Rem, .300 Blackout, 9mm, and 6mm ARC.

For handling and operational control, the bundle includes the authentic SB Tactical SBA3 Adjustable Pistol Brace, designed with an integral 6-position carbine buffer tube, 3.0 oz carbine buffer, recoil spring, castle nut, and end plate. Rounding out the build is the Always Armed Mil-Spec Lower Parts Kit, containing all standard springs, detents, safety selector, fire control group, and A2 grip necessary to turn your completed 80% frame into a fully functioning lower assembly.

Please review all federal, state, and local manufacturing laws before purchasing.

Key Features & Specifications:

• 7075-T6 Forged 80% Lower: Machined from high-strength forged aluminum with a durable Hardcoat Anodized finish and Fire/Safe markings.
• SB Tactical SBA3 Brace: Features an adjustable 5-position brace strap mechanism for improved stability and operational comfort.
• Complete Carbine Buffer Kit: Includes a 6-position buffer tube, 3.0 oz carbine buffer, carbine spring, castle nut, and end plate.
• Always Armed Mil-Spec LPK: Full lower parts kit featuring a standard trigger group, safety selector, springs, detents, and A2 grip.
• Multi-Caliber Versatility: Compatible with standard Mil-Spec uppers across 5.56, .223, .300 BLK, 9mm, 6.5 Grendel, and more.
• Color Options: Available with SB Tactical SBA3 brace options in Black, FDE, Sniper Gray, or OD Green.
• American Made: Components manufactured 100% in the USA.