Well, that's close, except the 653 clone has a 16" barrel that gives me about 3150 FPS with the IMI M193 ammo, so it is hitting harder than a military M4 with a 14.5" barrel. Actually, after my rehab session of the AR15, it functions 100% (except one bad round (Federal/Lake City M193 - almost a squib with very low charge with about half the report and flash, that failed to cycle). n With the exception of the defective round, 90 rounds functioned flawless. In fairness, the shoulder is in decent shape now, but not up to a continuous diet of magnum shot shells and .308 battle rifles. I have confidence in the CAR-15 and even the carbine, having killed a deer with it, with one heart lung shot. There are untold tens of thousands of dead enemy that the carbines killed very dead in three wars!