PRO2A 10.5" .450 Bushmaster 1/24 Carbine Length Melonite M-LOK AR-15 Upper Kit | Pro2A Tactical

PRO2A 10.5" .450 Bushmaster 1/24 Carbine Length Melonite M-LOK AR-15 Upper Kit

Product Overview

The PRO2A 10.5" .450 Bushmaster 1/24 Carbine Length Melonite M-LOK AR-15 Upper Kit brings devastating, straight-wall big-bore performance into a highly maneuverable, compact configuration. Chambered in the hard-hitting "Thumper" caliber, this complete conversion kit is specifically optimized to deliver immense kinetic energy transfer at close-to-medium ranges. Built with a premium 10.5-inch 4150 CMV steel barrel and an independent free-float M-LOK handguard, the package comes bundled with a specialized big-bore bolt carrier group, full lower parts kit, and adjustable heavy-recoil buffer system to cleanly overhaul any standard mil-spec lower receiver.

Key Features

Massive Thumper Performance: Fires heavy .450 caliber projectiles that provide devastating stopping power, ideal for close-quarters defensive setups or big-game tracking in dense brush.
Rugged Melonite Barrel Shielding: Liquid QPQ Nitride treatment hardens internal and external surfaces for superior wear resistance, straightforward cleaning, and maximum weather protection.
Optimal 1/24 Twist Rate: Precision-button rifling delivers the ideal twist stabilization required for standard, hard-hitting straight-wall hunting loads.
Enlarged Ejection Port Receiver: Built with a modified upper receiver featuring an enlarged ejection port to ensure reliable case ejection and eliminate structural shell hang-ups.
Complete Frame Assembly Package: Includes a matched .450 Bushmaster Bolt Carrier Group (BCG), an ergonomic slim M-LOK handguard, a full lower parts kit tree, and an adjustable blade system with a tailored heavy buffer.

Technical Specifications

Caliber / Chamber:	.450 Bushmaster
Barrel Length:	10.5 Inches
Barrel Material:	4150 Chrome Moly Vanadium Steel
Twist Rate:	1:24 Right-Hand Twist Button Rifled
Barrel Coating Finish:	QPQ Melonite / Black Nitride Finish
Gas System Length:	Carbine-Length Gas System with 0.750" Low Profile Gas Block Layout
Upper Receiver Type:	7075-T6 Forged Aluminum with Enlarged Ejection Port, Forward Assist & Port Cover (Type III Hardcoat Anodized)
Bolt Carrier Group (BCG):	Premium M16 Profile BCG with Properly Hooked .450 Bushmaster Bolt Face, Nitride Finish, MPI Tested
Muzzle Threads & Device:	5/8x24 TPI; Premium Big-Bore A2 Flash Hider
Handguard Interface:	9 Inch Free-Float Ergonomic Slim M-LOK Rail System with Continuous Top Picatinny Rail Layout
Lower Parts Kit (LPK):	Complete Mil-Spec Lower Parts Kit including crisp Single-Stage Fire Control Group (Trigger, Hammer, Springs), A2 Pistol Grip, and full pins/detent arrays
Stock Assembly:	Adjustable Blade complete with Pistol Buffer Tube, Heavy Carbine Recoil 3oz Buffer, Spring, Castle Nut, and End Plate
Manufacturing Origin:	100% Made in the USA

Why Choose This Product?

This all-in-one conversion kit offers an uncompromising solution for shooters wanting maximum big-bore impact from a lightweight, compact intermediate chassis. By unifying a factory-modified, enlarged ejection port upper receiver with a tuned carbine-length gas system, this kit ensures smooth extraction loops and reliable feeding cycles with heavy straight-wall cartridges. Fully headspaced and bundled with all necessary installation components, it provides sub-MOA close-range precision, excellent handling agility, and long-lasting durability engineered for professional performance.

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