looking at building my first clone, and a few major of parts are hard to find. what parts are you all using in place of the items you can not find or get? rail, flash hider? i want it to be correct as i can be but damn 600.00 for a rail? 300.00 flash hider.
Can you clarify what rifle you want to clone? Sopmod Block 2 can refer to a few different rifles. If you are gonna build a clone do it right. And if you are on a budget, do not attempt to build a clone, you will only be disappointed.
Sorry, it’s the one with the Daniel defense fsp ris ll rail, 14.5 colt socom barrel.
What flash hider are you looking for?
Surefire 4 prong
well thought I had that solved for you until you said FSP
https://danieldefense.com/upper-receiver-groups/daniel-defense-m4-urg-m4a1.html
If you put alternative parts on there then it’s not really a clone anymore. It’d just be more of an “inspired” build. Which is fine, but very different than a clone.
They’re expensive, but worth the time and effort. If you think the flash hider is bad wait until you go to buy the flashlight. Usually around $850 minimum if you can find one 
so far i have a colt marked m4a1 lower,lmt sopmod stock and kac buis. did they use lmt ergo grips? i see them posted on a lot of clones but not sure if its correct? also does color of the rail matter? that seems like a dumb question but would rather get it right.
“Did they use (fill in the blank)” all depends on who you mean by they. If you mean NSW-Crane, the options are limited. When it comes to the guns in the actual force, what is on a SOPMOD gun varies wildly. Even with the list above, there are several items that I have never seen on a SOPMOD gun (IE leupold MK8, the Nightforce 2.5-10).
As for the rails, some black DD ones are out there - I know for a fact some elements in 5th group bought them.
Rick
I think for a “clone” the rail is pretty much the most important part. There is no substitute there.
I got both my DD RIS II handguards about a year and a half ago on amazing sales, the black one I got for 150 on clearance from brownells and the fde one from rainier Arms for about 250. Both the fsp versions, unfortunately I haven’t found them on sale or in stock anywhere since.
Spending all those hours hunting for all the correct parts is what makes it so much fun. Not easy, sometimes rather expensive, but that’s all part of the game. For those things that you can’t simply locate you can either just not run them, and wait until you can find them, or substitute them with “knock offs” which can be frowned upon. Personally, the base rifle is relatively easy to build and locate parts for. Its the SOPMOD accessories like the WMX200, su230, su231, su231a, su233, etc. that are the difficult things to locate. Those are all things you can get later though. Build the base gun up, put a few thousand rounds through it, begin searching for the hard to find stuff, then when it’s complete, spray paint it lol.
some how today i found a brand new 4 prong surefire flash hider at a gun store i never go in. he had 200.00 and let me have it for 160.00. so yeah that the only update so far. oh and kac grip
KAC rail covers? Are you doing a MK18 MOD 0 build?
The DD rails didnt ever have KAC covers on them. They came with the brown rubbe/skeletonized covers but those were quickly discarded.
Rick
Nevermind I need to learn how to read better.
M4A1 SOPMOD Block II. this is the clone i am building.
Awesome xcell, renegade. A few comments on acceptable alternatives: ACOG +/- Doctor stayed in service on some guns, as did Surefire 6p’s and G2’s. Some guys hung onto the click tailcaps from the old huge Surefires and put them on the 6p’s and G2’s.
And I have used and seen all sorts of grips and slings on work guns, so I would consider pretty much whatever someone likes as acceptable on a block II clone.
I’d also add that I saw many guys ditch the “sought after” KAC sights for stuff like magpul. I’ve seen more than one dude get frustrated to find his front sight wouldn’t stay up and was easily knocked down after he had to use them when his eotech batteries died after a couple hours of CQB & Chill at the shoot house.
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probably going to with the lmt buis. after looking at a one i like those better.