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Expert Answer
The overall length is 6.125”. It is a carbine length drop-in handguard, so it will only fit your gun if you have a carbine length gas system with a drop-in handguard.
If it has carbine length gas system, as most 10.5in barreled pistols do (at least 5.56mm pistols), and has standard barrel nut/delta ring and round front end cap, should fit fine. Basically if your firearm came with standard carbine length handguards, (whether fatter M4 style or the slimmer carbine handguards, is irrelevant) and has the above mentioned standard features, it will work.