The 147029 Federal Patrol is basically a modified 6920. These carbines were configured to meet FBI specifications for private purchase by FBI agents. This is the only production carbine manufactured by Colt to use a Geissele rail. 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.
Stay safe & have a great day!

Hi Rob and welcome. The 147029 is the Federal Patrol with 6 Position Buffer Tube & Magpul Collapsible Stock, Ambidextrous Charging Handle, 13" M-Lok Free Float Handguard. The 132994 has a standard buttstock, non-free floated handguard. The 147029 has better parts and will be more accurate. Cheers and stay safe!