Colt Advance Piston Carbine Manual Variations

I am working through a large backlog of Colt manuals and advertisements that I have bought for my collection. In the process of this, I have noticed two variations of Colt Advance Piston Carbine manuals.

The top version is a ‘sky blue’ color and is 5-1/4″ x 5-1/4″. The bottom version is gray in color and is just slightly smaller at 5-3/8″ x 5-1/4″.

Both manuals are dated December 2011. Both have the Part No. of 96351 with no Revision noted. Notice that the top manual is 68 pages…the bottom manual is 67 pages.

The spines of manuals are slightly different. The blue manual has a squared off spine, more like a book, whereas the gray manual has more rounded binding. Both are stapled.

Colt M4 Carbine Federal Patrol Rifle

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.…/le6920-fbp2.htm

Description and two images below are from the Arms Unlimited website and validated through Colt.



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
Caliber: 5.56x45mm
Barrel: 16.1″
Capacity: 30+1
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