Ares/Fightlite SCR uses a proprietary BC which appears to be a shortened AR BC with reliefs drilled for the strut pin, along with AR bolt and firing pin.  Spoke with Fightlite, despite many requests they have no plans for a LH SCR.  My project idea is to mill a Stag LH BC to same dimensions as the SCR BC, add the pin holes, LH bolt and Gibbz LH SCU to create a LH SCR.  Other than milling the hardened BC, anyone see an issue with this idea?

I don't see any issues in it.  I think you're right in thinking it's that simple.

I really like the SCR, but there's no reason for the lower to cost as much as a complete rifle.  I get the CA laws and that driving some pricing, but it's not justifiable in my mind.  That said, I like it enough, copying it is on my short list.  I've gone over them a bunch, the upper always seemed like the EASY part of such a project so I haven't paid it too much mind.  I'm not a lefty, but the fab / engineering involved in modifying an existing design to a specific variant always appeals to my creative mindset.  Like many of the other CA compliant innovations.

In for others input.

You're right about the pricing.  I managed to get a 20% discount on Brownells, but even then the price is borderline exorbitant.  We (my son and I) plan to make a project out of it, wood stock, wood forends, and such.  So it will be fun, especially if the LH conversion works.  I have a benchtop mill, but think the carrier work will require a commercial machine shop.

Now that I have the SCR, after playing around with BCGs for a couple days.  Besides the length, major difference between AR and SCR carrier is added metal to the rear, lower portion around the strut pin hole, presumably to reinforce the area.  There is no hole for the firing pin retainer, this is accomplished by the strut pin.


See 3 options, hoping for some gunsmith/machinist input...

1.  Add metal and mill strut pin area to replicate SCR

2.  Drill strut pin hole to match SCR (without added metal)

3.  Drill strut pin hole slightly above SCR location.  There is approx. 1/16” space between the strut pin and firing pin.  Will change strut angle very slightly, not sure of effect on action.