Hi folks,

I'm looking to build a 9mm Mk18 clone: 10-11" barrel with a free float quad rail running the full length of the barrel.

https://dl.dropboxusercontent.com/u/44641205/mk18fde_l_1.jpg

So here's what I am thinking of putting together:

Standard Aero Precision stripped lower
PSA premium LPK (leftover from another build)
Milspec receiver extension (receiver end plate with swivel and castle nut)
Colt 9mm buffer
Carbine length spring
RRA or Colt 9mm BCG
Hahn Precision OR Rock River Arms magwell block (thoughts or opinions?)
Standard Aero Precision stripped upper
Ballistics Advantage 9mm 11" barrel
Basic A2 style birdcage (capable of passing 9mm)
Free float quad rail

Any glaring omissions? Any opinions on the parts I selected? Any better value options? I do believe "buy once cry once" but if there's a less expensive equally good way of doing things, I am not opposed to not crying at all.

What is the proper length for the quad rail on that setup to get the look I am after?

Many thanks in advance.

P

PSA's mag block works fine and is more cheaper

I checked PSA - they don't have any mag blocks listed. Maybe something they used to carry but don't anymore?

Thanks,

P