Build the ultimate AR-15 varmint platform with this F17-M4 Carbine Upper Kit from Franklin Armory. This is a complete upper assembly conversion kit chambered in .17 Winchester Super Magnum. It will turn your AR platform rifle into a varmint eradicating, predator vanquishing machine! The complete upper receiver features a 18" medium profile barrel and Franklin TLM-12 M-LOK compatible free float handguard. It has a clean running gas piston operating system and custom designed .17 WSM bolt carrier group. This kit includes a 10 round .17 WSM magazine that fits a standard AR-15 magazine well and a F17 Carbine Buffer.
Please Note: This kit is only designed to work with Carbine style receiver extension buffer tubes. It is not compatible with standard A2 receiver extension buffer tubes.

Specifications and Features:
Franklin Armory F17-M4 Carbine Upper Kit 4159
AR-15 .17 WSM Conversion Kit
.17 Winchester Super Magnum
Gas Piston Operated Semi Automatic
18" 4140 Chrome Moly Medium Profile Barrel with 1:9 Twist
Salt Bath Nitride Treated Chamber, Bore and Finish
Threaded Muzzle 1/2"x28 TPI with A2 Flash Hider
Forged 7075-T6 Aluminum A4 Upper Receiver
M1913 Picatinny Top Rail
Custom Designed .17 WSM Bolt Carrier Group
M-LOK Compatible Franklin TLM-12 Free Float and Knurled Handguard
Black Hard Coat Type III Anodized Finish

Includes:
Complete Upper Receiver
One 10 round .17 WSM magazine compatible with standard AR-15 lower receivers.
One F17 Carbine Buffer compatible with commercial and mil-spec Carbine buffer tubes.
Does Not Include:
Lower Receiver or Lower Receiver Assembly