That is the number of complete sets of triangular M16 handguards it takes to find a matching pair if the right handguard that came with the surplus upper was damaged beyond use.
What I am left with is two complete sets and a slightly damaged right that don't line up correctly on my particular M16 clone.
Interestingly, one set lined up PERFECTLY with each other on Willard's AR (which he traded for a set of A2 handguards) and they have a 1/32" gap in the palm on my gun.
Tolerance stack-up, thou art a bitch!
What I am left with is two complete sets and a slightly damaged right that don't line up correctly on my particular M16 clone.
Interestingly, one set lined up PERFECTLY with each other on Willard's AR (which he traded for a set of A2 handguards) and they have a 1/32" gap in the palm on my gun.
Tolerance stack-up, thou art a bitch!