Description
Samson FRB-4.5 M16/M4 Handguard Rail
This Samson FRB-4.5 M16/M4 handguard rail is a U.S. military Close Quarters Battle Kit rail section designed for standard M16/M4-style plastic handguards. These are original new-in-bag military rail kits marked with Samson Manufacturing CAGE code 037R7 and part marking FRB-4.5.
Samson FRB-4.5 M16/M4 Handguard Rail
The FRB-4.5 is a short Picatinny accessory rail that bolts directly to the existing vent holes in standard clamshell M16/M4 handguards. This allowed soldiers to add a forward accessory rail without replacing the original rifle handguard assembly.
Construction / Configuration / Pattern
Each kit includes the black Picatinny rail section, countersunk mounting screws, and original Close Quarters Battle Kit identification/instruction card. The card identifies the kit under NSN 1005-01-563-0151, contract W15QKN-08-D-0437, and O/P Code 9A.
The rail itself is marked CAGE 037R7, FRB-4.5, and SAMSOM / Samson Manufacturing style identifying markings. The rail has five mounting holes and a standard Picatinny profile for compatible lights, grips, or other rail-mounted accessories.
Historical Context / Pattern Development
The Samson FRB series was developed as a simple bolt-on rail solution for M16 and M4 rifles using standard plastic handguards. Rather than converting the rifle to a full railed handguard system, the FRB allowed a short accessory rail to be added directly to the existing handguard.
These kits were supplied as part of the U.S. military Close Quarters Battle, or CQB, accessory kit system. The 2008 contract and NSN markings place this rail within the Global War on Terror-era military accessory environment, when modular weapon-mounted accessories became standard issue across many service rifles and carbines.
Condition
New in bag / new old stock condition. Multiple are available, and the listing photos are representative of the kits being sold. Each kit includes the rail section, mounting screws, and original CQB Kit card. Packaging, card condition, and minor storage marks may vary slightly from kit to kit.
Listing Disclaimer
Listing is for one new-in-bag Samson FRB-4.5 rail kit. Buyer is responsible for verifying compatibility with their specific handguard and following all applicable laws and regulations.
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Focused Key Phrase: Samson FRB-4.5 M16/M4 handguard rail
Slug: samson-frb-4-5-m16-m4-handguard-rail
Meta Description: New in bag U.S. military Samson FRB-4.5 M16/M4 handguard rail from the Close Quarters Battle Kit, NSN 1005-01-563-0151.
Tags: Samson FRB-4.5 M16/M4 handguard rail, Samson Manufacturing rail, FRB-4.5 rail, CQB Kit rail, M16 handguard rail, M4 handguard rail, Picatinny rail section, NSN 1005-01-563-0151, CAGE 037R7, military rail kit
Suggested Image Alt Text:
Samson FRB-4.5 M16 M4 handguard rail kit
U.S. military Close Quarters Battle Kit rail section
Samson Manufacturing FRB-4.5 Picatinny rail with screws
NSN 1005-01-563-0151 M16 M4 handguard rail kit
New in bag Samson FRB-4.5 CQB Kit rail section
