5.56 Pistol Build Kit – 7.5″ Complete Upper Receiver
Elevate your firearm with this comprehensive 5.56 pistol build kit featuring a complete upper receiver, pistol stabilizer, and tactical parts kit. This kit provides everything you need to assemble a durable and high-performing pistol.
Complete 7.5″ 5.56 Upper Receiver
Specifications:
- Barrel:
- Length: 7.5 inches
- Material: 4150 Chrome Moly Vanadium
- Profile: DRP
- Finish: QPQ Corrosion Resistant
- Twist Rate: 1/7
- Muzzle: 1/2×28 threaded
- Gas System Length: Pistol
- Gas Block Journal: .750″
- Weight: 17 oz
- Crown: 11-degree target crown for enhanced accuracy
- Bolt Carrier Group (BCG):
- Bolt Material: Enhanced 9310 Steel
- Carrier Material: 8620 Tool Steel
- Features: Shot peened and MPI bolt, components polished for smooth operation.
- Upper Receiver:
- Material: Machined from Mil-Spec 7075 T6 Forging
- Finish: Hard coat anodized per Mil-A-8625F, Type III
- Features: M4 feed ramps
- Handguard:
- Type: 9.25″ Lightweight Free Float M-LOK
- Charging Handle:
- Material: Forged 7075 Aluminum
- Finish: Mil-Spec Type-III Hardcoat Anodized
Mission First – BATTLELINK Minimalist Pistol Stabilizer
- Design: Operates with one hand, stabilizing the pistol against the shooter’s forearm.
- Features:
- Sleek design with multiple sling slots and quick detach points
- Enhanced cheek weld for improved aim
- Compatible with standard Mil-Spec carbine receiver extension/buffer tube
- Note: Modifying or redesigning may be subject to NFA regulation; compliance is the buyer’s responsibility.
Complete Mil-Spec Lower Parts Kit (LPK)
Includes:
- Takedown/Pivot Spring & Detent
- Trigger/Hammer Pin
- Takedown Pin & Pivot Pin
- Bolt Catch, Bolt Catch Spring, & Buffer
- Safety Selector, Spring & Detent
- Buffer Retainer, Buffer Retainer Spring
- Trigger Guard & Roll Pin
- A2 Pistol Grip, Grip Screw & Lock Washer
- Trigger Spring, Hammer Spring, Disconnector Spring
- Magazine Catch Body, Spring, & Button
- Hammer, Trigger, & Disconnector








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