The Librarian’s Key 7.5-inch Pistol-Gas 1:16 .45 ACP AR-15 Freefloat M-Lok Handguard Pistol Upper Build Kit from Davidson Defense is engineered for the serious gunsmith seeking precision and functionality. Chambered in .45 ACP, the kit features a 7.5-inch 4150 CMV steel barrel with a government profile, a 1:16 twist rate, and a parkerized finish. Designed for a blowback gas system, it also includes a KAK Industry .45 ACP compensator, threaded at .578x28.
The upper receiver is crafted from billet 6061-T6 aluminum, finished with Type III hardcoat anodization for durability. The included 7-inch M-LOK handguard, in sleek black, provides versatile mounting options with additional partial Picatinny sections for accessories. This build kit combines robust materials and specifications to meet the demands of gunsmithing while delivering the freedom of a personalized shooting experience.
Caliber: .45 ACP
Barrel Length: 7.5-inch
Barrel Twist Rate: 1:16
Barrel Material: 4150 CMV Steel
Barrel Profile: Government
Barrel Thread Pitch: 37/64x28
Barrel Finish: Parkerized
Barrel Gas System: Blowback
Upper Receiver Name: AR-15 Billet Upper Receiver for Pistol Calibers
Upper Receiver Material: Billet 6061-T6 Aluminum
Upper Receiver Finish: Type III Hardcoat Anodized
Handguard Length: 7 inches
Handguard Color: Black
Handguard Style: M-LOK, Partial Picatinny
Muzzle Device: KAK Industry .45 ACP Compensator
Muzzle Thread Pitch: .578x28
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