Some of you may recall the previous FBI specification rifles that made it onto the civilian market as the LE6920-FBP1. There is now an updated specification rifle that has come onto the market with the SKU LE6920-FBP2. The rifle is available from Arms Unlimited.
Description and two images below are from the Arms Unlimited website and validated through Colt.
COLT M4 CARBINE FEDERAL PATROL RIFLE
The Colt Federal Patrol Carbine is an advanced rifle based on Colt’s legendary M4 platform adding key accessories as requested by the FBI. It features a new Geissele MK4 M-LOK® capable free-floated forend, and a set of Magpul PRO flip-up sights.
Action: Gas Operated Semi-Auto
Finish: Matte Black
Receiver: Matte Black
Safety: Reversible Safety Selector
Sights: Magpul PRO Sights
Stock: Collapsible / Folding Stock
Magazine: 1 / 30 rd. Magpul PMAG
Weight: 6.5 lbs.
Rate of Twist: 1-in-7″
Barrel Length: 16.1
Overall Length: 32 to 35.5
Features: M-LOK Capable Geissele 13″ MK4 Handguard