I emailed DSA on this very subject not log ago, and received this response;
Hello Patrick,
All of our rifles are custom built and currently we have about an 18
week delivery time, from date of order.
NO carry handle: No Charge
18" barrel (full length gas system) :No Charge
Quick release gas plug : No Charge
STG58 flashhider (or similar): No Charge
A2 Hampton lower: $70.00 Upgrade
L1A1 Safety (or similar): $16.95 Upgrade
L1A1 Mag release: We do not offer an L1A1 mag release: Ours are Israeli
Pattern.
Sand-cut blot carrier: You can not do a forward assist with a sand cut
carrier
Forward Asst. charging handle: $60.00 upgrade for all parts and labor.
Stripper clip extreme duty scope mount: $89.95 upgrade
Flat OD DuraCoat: $300 Upgrade
MSRP on an 18" fixed stock rifle would be $ $1595 + the upgrades listed
above.
The rifle will eat any surplus or commercial ammo from 110 to 168
grains.
We do not offer a volume discount on mags, and dura coat on each
magazine is a $20 upgrade.
Thanks for your interests!
Best Wishes,
DSA
The two things I don't get are;
Why no forwards asst./Sand cut bolt carriers? Couldn't they just modify the carrier to accept the F/A charging handle or even put sand-cuts in a standard carrier?
Why no L1A1 mag release? They list it as available.
I will ask them if I get up the 2 grand for the weapon, which might take a while. As for the mod's themselves, I guess I will explane for those who are not as familiar with the FN or the SHTF type of system I prefer.
No carry handle. If you don't have the weapon on a sling it should be in your hands ready to fire, carry handles are a waste and the FN handle tends to get loose and floppy over time which is a bad thing.
The 18" barrel is a compromise, the 20" is a shade too long for urban terrain or CQB but gives better long range performance, while the 16" is better for them but has some problems with accuracy. Mostly it is personal preference though, the 18" version seems to balance better than the 20" or the 16". The 7.62 NATO was also optimized for an 18" barrel as I understand. I also like the full length gas system as the spare parts are standard.
The quick release gas plug is just for ease of maintenance.
The STG58 flash suppressor is good for it's job AND is an emergency wire cutter (put the wire in the slots and pull the trigger)
The A2 Hampton lower uses the M-16A2 rear sight which is one of the best ever invented, while the standard FN rear sucks for any kind of fine shooting.
The L1A1 safety is larger and much easier to use.
The L1A1 mag release also large and easy to use.
The sand-cut bolt carrier significantly improves reliability in sandy/dusty environments over the standard carrier.
The forward assist charging handle is designed to allow you to push the handle in and force the bolt-carrier open or closed. This can be very important with bad ammo or if the weapon is very dirty. I would prefer the handle attached to the carrier, but you can't do that with the FN.
The stripper-clip scope mount top cover is a little weird for most people because it opens the action up more for dirt and debris to enter. However, in a SHTF scenario you would not be packing a dozen magazines all the time. You are better off carrying a few mags (6 in a chest pouch for me) and a few hundred rounds on strippers. By having the stripper-clip cover you can reload your weapon right from the strippers, or reload the mags quickly without a separate clip guide, which can get lost or damaged. While the D&D issue can be a problem I think the advantage of this mount outweighs the problem, though if I lived in a really sandy/dusty I might feel differently, but here in the frozen north, I don't see a problem. Also, while I'm not big on optics for a SHTF weapon, this mount will let me add a combat optic if I decide to do so.
Lastly is the DuraCoat, which is a great coating for reducing corrosion problems and visual signature. FYI, black weapons can be spotted more quickly in the field than most people imagine. Plus, a solid green, O.D., or Dark Earth (AKA, baby sh** yellow) can be camouflaged with a little spray paint, where a full camo scheme can be a liability if you find yourself in a different area. I would like the mags DuraCoated but I would do it myself rather than pop for $2000 to coat 50 mags.
I hope this helps.